Front Range, Eastern Slope, Rocky Mountains Checklist Flora of Native and Naturalized Vascular Plants of Golden and Vicinity, Jefferson County, Colorado (Continued)  

Tom Schweich  

Home Page
Topics in this Article:
Introduction
Geography
History of Botanic Exploration and Publication
Useful Publications
Methods
Results
Discussion - Native Plants
Discussion - Non-Native Plants
Conclusion
Acknowledgements
Literature Cited
Appendices
 Golden, Colorado sits in a valley formed by erosion along the Golden fault, the geotectonic boundary between the North American Cordillera and the Great Plains. Somewhat like Mono Lake, for which I have also prepared a checklist flora, it sits at a boundary, or perhaps ecotone. Things are always more interesting at the boundaries. I started this project when I realized no such list had been prepared for my newly adopted city. I hope you find this checklist flora helpful. Please write to me if you have questions or comments.

 

 

   

Literature Cited

  A list of all literature cited by this web site can be found in the Bibliography.
  Ackerfield, Jennifer. 2015. Flora of Colorado. Fort Worth, TX 76107-3400: Botanical Research Institute of Texas, 2015.
  Ackerfield, Jennifer. 2022. Flora of Colorado, Second Edition. Botanical Miscellany No. 60. Fort Worth, Texas: BRIT Press, Fort Worth Botanical Garden, 2022.
  Adams, Robert P., and Andrea E. Schwarzbach. 2013. Phylogeny of Juniperus using nrDNA and four cpDNA regions. Phytologia. 95(2):179-187.
  Aedo, Carlos. 2001. The Genus Geranium L. (Geraniaceae) in North America. II. Perennial Species. Anales Jard. Bot. Madrid. 59(1):3-65. {TAS-pdf}
  Aiton, William. 1789. Hortus Kewensis; or, a Catalogue of the Plants Cultivated in the Royal Botanic Garden at Kew. London: 1789.
  Aiton, William T. 2nd. ed., 1810-13. Hortus kewensis, or, A catalogue of the plants cultivated in the Royal Botanic Garden at Kew. 5 vols.. London: Longman, Hurst, Rees, Orme, and Brown, 1810-1813. Link to external document.
  Allioni, Carlo. 1766. Stirpium aliquot defcriptiones cum duorum novorum generum conftitutione. Mélanges de Philosophie et de Mathématique de la Société Royale de Turin. Tomus 3: 177-178. Link to external document.
  Allred, Kelly W. 2020. I: Annotated Checklist. Flora Neomexicana. 3rd edition. Link to external document.
  Al-Shebaz, I. A. 2014. A Synopsis of the Genus Noccaea (Coluteocarpeae, Brassicaceae). Harvard Papers in Botany. 19(1):25-51. {TAS-pdf} doi:10.3100/hpib.v19iss1.2014
  Al-Shehbaz, Ihsan A., and Steve L. O'Kane. 2002. Lesquerella is united with Physaria (Brassicaceae). Novon. 12: 319-329. {TAS-pdf}
  Anderberg, Arne A. 1991. Taxonomy and phylogeny of the tribe Gnaphalieae (Asterceae). Opera Botanica. 104: 1-195. Unable to find this publication online.
  Anderson, Donna S., and Paul B. Haseman. 2021. Golden Rocks: The Geology and Mining History of Golden, Colorado. Golden, Colorado, USA. Link to external document. https://doi.org/10.25676/11124/14162
  Anderson, Kling, and A. E. Aldous. 1937. Monoecious Buffalo Grass, Buchloe Dactyloides. Agronomy Journal. 29(8):709-710.
  Andersson, Nils Johan. 1858. Enumeratio Salicum nobis ex America boreali huc usque cognotarum “The Willow Flora known to us from north America”. Öfversigt af Kongl. Vetenskaps-akademiens forhandlingar “Overview of the Proceedings by the Royal Academy of Sciences”. 15: 114-133. Link to external document.
  Andres-Hernandez, A. R., and T. Terrazas. 2009. Leaf architecture of Rhus s.str. (Anacardiaceae). Feddes Repertorium. 120(5-6):293-306. {TAS-pdf} Date retrieved: 16 June 2020: URL:
  Andres-Hernandez, Agustina Rosa, Teresa Terrazas, Gerardo Salazar, and Helga Ochoterena. 2014. Phylogenetic analysis based on strructural and combined analyses of Rhus s. s. (Anacardiaceae). Botanical Journal of the Linnean Society. 176(4):452-468.
  Editors of Wikipedia. 2021. João do Amaral Franco. Wikipedia. Link to external document. Date retrieved: 14 March 2021
  Anonymous. n.d.. Provisional Vascular Plant List for Arches National Park. Link to external document.
  Anonymous. 1971. Notes. SIDA Contributions to Botany. 4(3):265. Link to external document.
  Angiosperm Phylogeny Group. 2003. An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants. Botanical Journal of the Linnean Society. 141: 399-436. {TAS-pdf}
  Argus, George W. 2010. Salix. Flora of North America North of Mexico. 7. Link to external document.
  Arkansas Valley Seeds. 2019. Rocky Mountain Native Mix. Link to external document. {TAS-pdf} Date retrieved: 14 November 2019, 12 January 2020.
  Babcock, E. B., and G. Ledyard Stebbins. 1938. The American Species of Crepis: Their Interrelationships and Distribution as Affected by Polyploidy and Apomixis. Washington, DC: Carnegie Institution of Washington, 1938. Link to external document.
  Bahm, Matt A., Thomas G. Barnes, and Kent C. Jensen. 2011. Restoring Native Plant Communities in Smooth Brome (Bromus inermis)–Dominated Grasslands. Invasive Plant Science and Management. 4(2):239-250.
  Bailey, L. H. 1886. A Preliminary Synopsis of North American Carices, including those ot Mexico, Central America, and Greenland, with the American Bibliography of the Genus. Contribution from the Herbarium of Harvard University. Proceedings of the American Academy of Arts and Sciences. 22: 59-157. Link to external document.
  Bailey, L. H. 1889. Studies of the Types of various Species of the Genus Carex. Memoirs of the torrey Botanical Club. 1(1):1-86. Link to external document.
  Baillon, Henri. 1867-95. Historie des Plantes. 13 vols.. Link to external document.
  Bai, T. J. 1990. Association of Bouteloua gracilis (H.B.K.) Lag. [and] Buchloe dactyloides (Nutt.) Engelmann. Dissertation Abstracts International. B. Sciences and Engineering. 50(8):3247B-3248B.
  Baldwin, Bruce G., Douglas H. Goldman, David J. Keil, Robert Patterson, and Thomas J. Rosatti. 2012. The Jepson Manual: Vascular Plants of California, Second Edition. Berkeley, CA: University of California Press, January 2012. {TAS}
  Baldwin, Bruce G., and Kenneth R. Wood. 2016. Origin of the Raa endemic Apostates: Revisiting major disjunctions and evolutionary conservatism in the Bahia alliance (Compositae: Bahieae). Taxon. 66(5):1064-1080. Link to external document.
  Barkley, Arthus S. 1959. New Considerations in an Old Genus: Datura. Botanical Museum Leaflets, Harvard University. 18(6):245-. Link to external document.
  Barkley, Fred Alexander. 1937. A Monographic Study of Rhus and Its Immediate Allies in North and Central America Including the West Indies. Annals of the Missouri Botanic Garden. 24(3).
  Barkworth, Mary E. 1990. Nassella (Gramineae, Stipeae): Revised Interpretation and Nomenclatural Changes. Taxon. 39(4):597-614. Link to external document.
  Barkworth, Mary E. 1993. North American Stipeae (Gramineae): Taxonomic Changes and Other Comments. Phytologia. 74(1):1-25. Link to external document. Date retrieved: 26 March 2021
  Barkworth, Mary E., and Douglas R. Dewey. 1985. Genmically based genera in the perennial Triticeae of North America: Identification and Membership. American Journal of Botany. 72(5):767-776. {TAS-pdf}
  Barneby, R. C. and S. L. Welsh. 1996. Astragalus laxmannii Jacquin (Leguminosae) in North America. Great Basin Naturalist. 56(1):85-86. Link to external document.
  Barton, William P. C. 1815. Florae Philadelphicae prodromus; plantarum quae hactenus exploratae fuere, quaeque in ipso opere ulterius describentur, exhibens enumerationem. [Prodromus of the flora Philadelphica; exhibiting a list of all the plants to be described in that work, which have as yet been collected ... ]. Philadelphia: J. Maxwell, 1815. Link to external document. 1815
  Bayer, Randall J. 1990. A phylogenetic reconstruction of Antennaria Gaertner (Asteraceae: Inuleae). Canadian Journal of Botany. 68(6):1389-1397.
  Beaman, John H. 1957. The Systematics and Evolution of Townsendia (Compositae). Contributions from the Gray Herbarium of Harvard University. No. . Cambridge, MA: Gray Herbarium of Harvard University, 1957. Link to external document. {TAS-pdf}
  Beauvois, Palisot de. 1812. Essai d'une nouvelle agrostographie, ou, Nouveaux genres des graminées : avec figures représentant les caractères de tous les genres. Paris: Chez l'auteur, 1812. Link to external document.
  Beckwith, Lt. E. G. 1855. Report of Explorations for a Route for the Pacific Railroad by Capt. J. W. Gunnison, Topographical Engineers, bear the 38th and 39th Parallels of North latitude. Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean. 2. Link to external document.
  Bell, Charles D. 2010. Towards a Species Level Phylogeny of Symphoricarpos (Caprifoliaceae), Based on Nuclear and Chloroplast DNA. Systematic Botany. 35(2).
  Bentham, George. 1845. Polemoniaceae. Prodromus systematis naturalis regni vegetabilis, sive, Enumeratio contracta ordinum generum specierumque plantarum huc usque cognitarium, juxta methodi naturalis, normas digesta. 9: 302-. Link to external document.
  Bentham, George. 1846. Scrophulariaceae. pp. in DeCandolle, A. P.. Prodromus systematis naturalis regni vegetabilis, sive, Enumeratio contracta ordinum generum specierumque plantarum huc usque cognitarium, juxta methodi naturalis, normas digesta. 10: 186 -586. Link to external document.
  Bentham, George, and Joseph Dalton Hooker. 1862. Genera plantarum :ad exemplaria imprimis in Herberiis Kewensibus servata definita. 1(1). Link to external document.
  Bentham, George, and John Dalton Hooker. 1873. Genera Plantarum. 3 vols..
  Berchtold, Bedrich (Friedrich) Všemír (Wssemjr) von, and Jan Svatopluk (Swatopluk) Presl. 1823. Ranunculaceae. nynegss ylo znanj, pýtwn rostlin : názwoslowj audu, hospodárstwj gegich, rozssjrenj po semi a zpusob rostlinár zrjditi a zacowati. Praze (Praha). 1(Ranunculaceae):22. Link to external document.
  Besser, Wilibald S. 1822. Enumeratio plantarum hucusque in Volhynia, Podolia, Gub. Kiioviensi, Bessarbia Cis-Tyraica et circa Odessam collectarum, simul cum observationibus in primitias florae Galiciae Austriacae ... Vilnae (Vilnius): J. Zawadsi, 1822. Link to external document.
  Biodiversity Heritage Library Consortium. 2015 - 2022 &c.. Biodiversity Heritage Library. Washington, DC: Smithsonian Institution, 2006 to present. Link to external document. Retireved frequently from the beginning of this project (2015?) through the current date.
  Bieberstein, Marschall von, Freidrich August. 1808. Flora taurico-caucasica exhibens stirpes phaenogamas :in Chersoneso Taurica et regionibus caucasicis sponte crescentes. Charkouiae [Kharkov]: Typis Academicis, 1808-1819. Link to external document.
  Bodo Slotto, Tracey A., David P. Horvath, and Michael E. Foley. 2012. Phylogeny og Cirsium spp. In North America: Host Specificity Does Not Follow Phylogeny. Plants (Basel). 1(2):61.73. {TAS-pdf}
  Boott, William. 1884. Notes on Cyperaceae. Botanical Gazetta. 9(6):86-94. Link to external document.
  Brand, A. 1907. IV. 250 Polemoniaceae. pp. Heft 27 in Engler, Adolf. Das Pflanzenreich :regni vegetablilis conspectus. 27(1-203). Leipzig: Verlag von Wilhelm Engelmann, 1907. Link to external document.
  Branner, John C., and F. V. Coville. 1888. A list of the plants of Arkansas. Arkansas Geological Survey, Annual Administrative Report. 4: 155-242. Link to external document. Date retrieved: 11 September 2020, 12 January 2021.
  Braun, Alexander, and George Engelmann. 1844. A Monography of the North American species of the genus Equisetum [translated from the author's manuscript, and with some additions. American Journal of Science and Arts. 46: 81-104. Link to external document.
  Bremer, Kare. 1994. Asteraceae: Cladistics and Classification. Portland: Timber Press, 1994.
  Brewer, W. H., Sereno Watson, and Asa Gray. 1880. Botany. Geological Survey of California.. 2 vols.. Link to external document. Volume I (https://www.biodiversitylibrary.org/item/62963) describes the Polypetalae by W. H. Brewer and Sereno Watson, with Gamopetalae by Asa Gray. Volume II (https://www.biodiversitylibrary.org/page/19069657) by Sereno Watson describes the Apetalae, including the Gymnospermae, Monocots, &c.
  Britton, Nathaniel Lord. 1889. A list of plants collected at Fort Verde and vicinity and in the Mogollon and San Francisco Mountains, Arizona, 1884-1888, by Dr. E. A. Mearns, U. S. A. (with descriptions of new species). Trans. New York Acad. Sci. 8: 61-76.
  Britton, Nathaniel Lord. 1882. Notes on the Autumn Flora of Southern Wyoming and Eastern Colorado. Bulletin of the Torrey Botanical Club. 8(12):156. Link to external document. Date retrieved: 31 January 2021. Very brief, without much detail.
  Britton, Nathaniel Lord. 1889. New or Noteworthy North American Phanerogams, II. Transactions of the New York Academy of Sciences. 9: 6-14.
  Britton, Nathaniel Lord. 1900. Descriptions of new North American Thorns. Bulletin of the New York Botanical Garden. 1(5):447-449.
  Britton, Nathaniel Lord. 1901. Manual of the Flora of the Northern States and Canada. New York: Henry Holt & Company, 1901. Link to external document. Date retrieved: 23 October 2020,
  Britton, Nathaniel Lord, and Addison Brown. 1898. An Illustrated Flora of the Northern United States, Canada, and the British Possessions. No. . Charles Scribner's Sons: New York, 1898.
  Britton, Nathaniel Lord, and Addison Brown. 1913. An Illustrated Flora of the Northern United States, Canada, and the British Possessions. Second Edition. No. . Charles Scribner's Sons: New York, 1913. Link to external document. Date retrieved: 17 February 2016,
  Britton, Nathaniel Lord, and H. H. Rusby. 1887. A list of plants collected by Miss Mary B. Croft, 1884-'85, at San Diego, Texas, near the Headwaters of the Rio Dulce. Transactions of the New York Academy of Sciences. 7: 7-14. Link to external document.
  Britton, Nathaniel Lord, and J. N. Rose. 1919-1923. The Cactaceae. 4 vols.. Washington: Carnegie Institution of Washington. Link to external document.
  Britton, Nathaniel Lord, Emerson Ellick Sterns, and Justus Ferdinand Poggenburg. 1888. Preliminary catalogue of Anthophyta and Pteridophyta, reported as growing spontaneously within one hundred miles of New York City. New York: Torrey Botanical Club, April 25, 1888. Link to external document.
  Britton, Nathaniel Lord, et al. 1894. List ot Pteridophyta and Spermatophyta growing without Cultivation in Northeastern North America. Memoirs of the Torrey Botanical Club. 5: 1-366. Link to external document. Written by a committee composed of N. L. Britton, Frederick V. Coville, John M. Coulter, Lucien M. Underwood, Henry H. Rusby, Lester F. Ward, and William. A. Kelerman. The committee was increased to nine persons with the addition of Edward L. Greene and William Trelease.
  Brooks, Ralph E. 1982. New Combinations in Delphinium and Rhus. Phytologia. 52(1):8. Link to external document. Date retrieved: 6 October 2020:
  Brown, Georgina. 1976. The Shining Mountains. Leadville, CO: Georgina Brown, 1976. {TAS}
  Brown, Robert. 1810. Prodromus Florae Novae Hollandiae et Insulae van-Diemen. London: 27 March 1810. Link to external document. Date Retrieved: 9 Jun 2020, URL:
  Bruneau, Anne, Julian R. Starr, and Simon Joly. 2007. Phylogenetic Relationships in the Genus Rosa: New Evidence from Chloroplat DNA sequences and an Appraisal of Current Knowledge. Systematic Botany. 32(2):366-378. DOI:10.1600/036364407781179653
  Brunquist, E. H. 1966. Flora. pp. 6-11 in Irwin-Williams, Cynthia, and Henry J. Irwin, 1966. Excavations at Magic Mountain: A Diachronic Study of Plains-Southwest Relations. Denver Museum of Natural History, Proceedings No. 12. Denver, Colorado: Denver Museum of Natural History, October 20, 1966. {TAS-pdf}
  Buckley, S. B. 1861. Description of NEW PLANTS from Texas. Proceedings of the Academy of Natural Sciences of Philadelphia. 13: 448-___.
  Buerki, Sven, Porter P. Lowry II, nadir Alvarez, Sylvain G. Razafimandimbison, Phillipe Kupfer, & Martin W. Callmander. 2010. Phylogeny and circumscription of Sapindaceae revisited: molecular sequence data, morphology and biography support recognition of a new family, Xanthoceraceae. Plant Ecology and Evolution. 143(2):148-159. https://doi.org/10.5091/plecevo.2010.437
  Bunge, Alexander von. 1835. Enumeratio plantarum quas in China boreali collegit Dr. Al. Bunge Anno 1831. Mem. Sav. Etu. Acad. Sci. St. Perersb.. 2: 74-147. Link to external document.
  Burns, Russell M., and Barbara H. Honkala. 1990. Silvics of North America. Agriculture Handbook 654. Washington, D.C.: U. S. Department of Agriculture, Forest Service, 1990. Link to external document.
  Burr, Richard D. 1951. Uncommon Occurrence in Buffalograss. Journal of Rangeland Ecology and Management. 4: 267-269.
  Butters, Freferick K., and Harold St. John. 1917. Studies in certain North American Species of Lathyrus. Rhodora. 19(224):156-163. Link to external document.
  Buxbaum, Franz. 1951. [Unknown title]. Oesterreichische Botanische Zeitschrift. Gemeinnütziges Organ für Botanik …. 98: 78.
  Calder, James A., and Roy L. Taylor. 1965. New Taxa and Nomenclatural Changes with Respect to the Flora of the Queen Charlotte Islands, British Columbia. Canadian Journal of Botany. 43(11):1387-1400. https://doi.org/10.1139/b65-148
  Cassini, Alexandre H. G. 1817. Apercu des Genres nouveaux formés par M. Henri Cassinï dans la famille des Synanthérées. Troisieme Fascicule. Bulletin des Sciences, par la Société Philomatique. Link to external document.
  Cassini, Alexandre Henri Gabriel. 1818. Apercu des genres nouveaux formes per M. Henri Cassini dans la famile des Synantherees. Neuvieme Fascicule. Bulletin des Sciences, par la Société Philomatique. Link to external document.
  Cavanilles, Antonio Jose. 1797. Icones et desciptiones plantarum. Matriti: Ex Regia Typographia, 1791. Link to external document.
  Chamisso, Adelbertus, and Diedericus Schlechtendal. 1828. Plantis in Expeditione Speculatoria Romanzoffiana Observatis [Plants Seen in Romanzoff's Scouting Expedition]. Linnaea : Ein Journal für die Botanik in ihrem ganzen Umfange. 3(1):32-33. Link to external document.
  Chapin, Charles E., Shari A. Kelley, and Steven M. Cather. 2014. The Rocky Mountain Front, southwestern USA. Geosphere. 10(5):1043-1060. {TAS-pdf}
  Clemants, Steven E., and Gerry Moore. 2003. Patterns of Species Diversity in Eight Northeastern United States Cities. Urban Habitats. 1(1). {TAS-pdf}
  Cochrane, Theodore S. 1976. Taxonomic status of the Onosmodium molle complex (Boraginaceae) in Wisconsin. The Michigan Botanist. 15(2):103-110 (331-338). Link to external document.
  Cockerell, T. D. A. 1902. Notes on Southwestern Plants. Torreya. 2(3). Link to external document.
  Colorado Department of Agriculture. 2014-2019. Noxious Weeds. Date retrieved: 2014-2019, https://www.colorado.gov/pacific/agconservation/noxiousweeds
  Colbry, Vera Lyola. 1957. Diagnostic characteristics of the fruits and florets of economic species of North American Sporobolus. Contributions from the United States National Herbarium. 34(1). Washington, D. C.: United States National Museum, 1957. {TAS-pdf} Taxa found in Golden: Sporobolus airoides, S. compositus, and S. cryptandrus. There are no Sporobolus collections from the Mono Lake basin.
  Colorado Natural Heritage Program. 2005. Rocky Mountain Lower Montane - Foothill Shrubland. Ecological System Descriptions and Viability Guidelines for Colorado. Fort Collins, Colorado: Colorado Natural Heritage Program, Colorado State University, 2005. {TAS-pdf} (http://www.cnhp.colostate.edu/download/projects/eco_systems/eco_systems.asp, accessed 27 October 2014)
  Colorado Tree Coalition. 2023. Yellowhorn. Link to external document. Date retrieved: 14 May 2023
  Columbus, J. Travis. 1999. An expanded circumscription of Bouteloua (Graminae: Chloridoideae): New Combinations and Names. Aliso. 18(1):61-65. {TAS-pdf}
  Columbus, J. Travis, Michael S. Kinney, Maria Elena Siqueiros Delgado, and J. Mark Porter. 2000. Phylogenetics of Bouteloua and Relatives (Granineae: Chloridoideae): Cladistic Parsimony Analysis of Internal Transcribed Spacer (nrDNA) and trnL-F (cpDNA) Sequences. pp. 189-194 in Jacobs, Surrey W. L., and Joy Everrrett. Grasses: Systematics and Evolution. Collingwood, Victoria, Australia: CSIRO, 2000.
  Colwell, Robert K. 2008. Biodoversity: Concepts, Patterns, and Measurement. pp. in Levin, Simon A.. The Princeton Guide to Ecology. 2008. {TAS-pdf} (http://press.princeton.edu/chapters/s3_8879.pdf, accessed 23 Nov 2014.
  Colorado Natural Heritage Program. 2005. Ecological System Descriptions and Viability Guidelines for Colorado. Fort Collins, Colorado: Colorado State University.
  Coulter, John Merle. 1885. Manual of the botany (phaenogamia and pteridophyta) of the Rocky mountain region : from New Mexico to the British boundary. New York: American Book Company, 1885. Link to external document.
  Coulter, John M. 1890. Upon a collection of plants made by Mr. G. C. Neally in the region of the Rio Grande, in Texas, from Brazos Santiago to El Paso County. Contributions from the United States National Herbarium. 1: 29-62. Link to external document. Date retrieved: 21 March 2021.
  Coulter, John M. 1891. Botany of Western Texas. Contributions from the United States National Herbarium. 2: 1-569. Link to external document.
  Coulter, John M., and Aven Nelson. 1909. New Manual of Botany of the Central Rocky Mountains (Vascular Plants). New York: American Book Company, 1909. Link to external document. {TAS-pdf}
  Coulter, John M., and Joseph N. Rose. 1888. Revision of North American Umbelliferae. Crawfordsville, Indiana: Wabash College, 1888. Link to external document. Date retrieved: 20 April 2021.
  Coulter, John M., and J. N. Rose. 1900. Monograph of the North American Umbelliferae. Contributions from the United States National Herbarium. 7(1):9-256. Link to external document.
  Coville, F. V. 1888. Notes on the Botany of Arkansas. Arkansas Geological Survey, Annual Administrative Report. 4: 243-252.
  Coville Frederick V. 1893. Botany of the Death Valley Expedition. Contributions from the U. S. National Herbarium. 4. Washington, D. C.: Government Printing Office, 1893. Link to external document.
  Coville, Frederick Vernon. 1895. Juncus scirpoides and its immediate Relatives. Bulletin of the Torrey Botanical Club. 22(7):302-305. Link to external document.
  Cronquist, Arthur. 1947. A revision of the North American species of Erigeron, north of Mexico. Brittonia. 6: 121-302.
  Cronquist, A, D. D. Keck, and B. Maguire. 1956. Validity of Nuttall's names in Fraser's Catalogue. Rhodora. 58: 23-24.
  Crosswhite, Frank S. 1965. Concerning Penstemon unilateralis and Penstemon secundiflorus. The Southwestern Naturalist. 10(4):318.
  Colorado State University. 2019. Guide to Poisonous Plants. Date retrieved: 8 May 2020. URL: https://csuvth.colostate.edu/poisonous_plants/
  Cuvier, Frederic. 1821. Dictionnaire des sciences naturelles, dans lequel on traite … Abbreviated: Dict. Sci. Nat. (ed. 2). 20. Link to external document.
  DeCandolle, Augustin Pyramus de. 1818. Regni vegetabilis systema naturale, sive Ordines, genera et species plantarum secundum methodi naturalis normas digestarum et descriptarum. 2 vols. Parisiis: Treuttel et Würtz,1818-21. Link to external document.
  DeCandolle, Augustus Pyramus. 1836. Prodromus Systematis Naturalis Regni Vegetabilis. Paris: 1836. Link to external document.
  DeCandolle, Augustus Pyramus. 1844. Prodromus Systematis Naturalis Regni Vegetabilis. 8. Paris: 1844. Link to external document.
  DeCandolle, Agustin Pyramus. 1849. Prodromus systematis naturalis regni vegetabilis, sive, Enumeratio contracta ordinum generum specierumque plantarum huc usque cognitarium, juxta methodi naturalis, normas digesta. 13(2). Link to external document.
  DeCandolle, Augustus Pyramus. 1857. Prodromus Systematis Naturalis Regni Vegetabilis. 14. Paris: 1857. Link to external document.
  Denver Botanic Garden. 2023. Xanthoseras. Gardens Navigator. Link to external document. Date retrieved: 14 May 2023
  Der, Joshua P., and Daniel L. Nickrent. 2008. A Molecular Phylogeny of Santalaceae (Santalales). Systematic Botany. 33(1):107-116. Link to external document.
  Desfontaines, Rene Louiche. 1780. Memoire sur le genre Concallaria. Annales du Muséum d'histoire naturelle. 9: 45-. Link to external document.
  Desfontaines, Rene Louiche. 1829, 3rd edition. Catalogus Plantarum Horti regii parisiensis cum annotationibus de plantis novis aut minus cognitis. Paris: J. S. Chaude´, 1829. Link to external document. There was also a 1st edition (1804) and a 2nd edition (1815).
  Dewey, C. 1854. Caricography. (Continued from vol. ix, p. 30, Second Series). The American Journal of Science and Arts. Series 2. 18: 102-103. Link to external document.
  Dietrich, David Nathaniel Friedrich. 1847. Synopsis Plantarum seu enumeratio systematica plantarum…. 4. Link to external document. Issued in five volumes: Vol. 1, Jul 1839, Vol. 2, 1-20 Dec 1840, Vol. 3, late Dec 1842, Vol. 4, early Jan 1847, Vol. 5, Apr 1852. Volume 4.
  Dillenius, Johan Jacob. 1732. Hortus Elthamensis, seu Plantarum rariorum, quas in horto suo Elthami in Cantio coluit ... Jacobus Sherard ... Guilielmi ... frater delineationes et descriptiones. London: Sumptibus auctoris. Link to external document.
  Don, George. 1831-1838. A general history of the dichlamydeous plants :comprising complete descriptions of the different orders...the whole arranged according to the natural system. 4 vols.. Link to external document. Date retrieved: 15 October 2020,
  Douglas, David. 1830. LIV. An Account of some new, and little known Species of the Genus Ribes. Transactions of the Horticultural Society of London. 7(4):508-519. Link to external document. Date retrieved: 9 April 2021.
  Drewes, Harald. 2008. Table Mountain shoshonite porphyry lava flows and their vents, Golden, Colorado. U. S. Geological Survey Scientific Investigations Report 2006-5242.
  Dunal, Felix. 1819. Sur deux Genres de Plantes de la famille des Composees. Annales du Muséum d'histoire naturelle. 5: 45-58. Link to external document.
  Duncan, Celestine and Melissa Brown Munson. 2018. Canada Thistle: A Literature Review of Biology and Management. Techline: Invasive Plant News. {TAS-pdf} Date retrieved: 22 September 2019: https://www.techlinenews.com/articles/2016/canada-thistle-literature-review
  Eckenwalder, James E. 1977. North American Cottonwoods (Populus, Salicaceae) of Sections Abaso and Aigeiros. Journal of the Arnold Arboretum. 58(3):193-208. Link to external document.
  Egan, Ashley N., and James L. Reveal. 2009. A New Combination in Pediomelum and a New Genus, Ladeania, from Western North America (Fabaceae, Psoralaeae). Novon. 19: 310-314. {TAS-pdf}
  Elliott, Stephen. 1821-1824. A sketch of the botany of South Carolina and Georgia. 2 vols. Date retrieved: 27 September 2020, https://www.biodiversitylibrary.org/bibliography/9508
  Emadzade, Khatere, Carlos Lehnebach, Peter Lockhart, and Elvira Horandl. 2010. A molecular phylogeny, morphology, and classification of genera of Ranunculeae (Ranunculaceae). Taxon. 59(3):809-828. Link to external document.
  Emory, William H. 1848. Notes of a military reconnaissance, from Fort Leavenworth, in Missouri, to San Diego, in California, including parts of the Arkansas, Del Norte, and Gila rivers. Washington: Wendell and Van Benthuysen, printers, 1848.
  Engelmann, George. 1848. Botanical Appendix. Memoir of a tour to northern Mexico :connected with Col. Doniphan's expedition, in 1846 and 1847. Link to external document.
  Engelmann, George. 1850. Cactaceae. pp. 195-209 in Gray, Asa. Art. I. - Plantae Lindheimerianae, Part II. An Account of a Collection of Plants made by F. Lindheimer in the Western Part of Texas, in the Years 1845-6, and 1847-8, with critical remarks, …. Boston Journal of Natural History. 6(2):141-240. Link to external document.
  Engelmann, George. 1856. Synopsis of the Cactaceae of the Territory of the United States and Adjacent Regions. Proceedings of the American Academy of Arts and Sciences. 3: 259-314. Link to external document.
  Engelmann, George, M.D. 1859. Two new dioecious grasses of the United States. Transactions of the Academy of Science of St. Louis. 1: 431-442. {TAS-pdf}
  Engelmann, George. 1863. Additions to the Cactus-Flora of the Territory of the United States. Transactions of the Academy of St. Louis. 2. Link to external document.
  Engelmann, Georg, and John M. Bigelow. 1856. No. 3, Description of the Cactaceae. Report of the Botany of the Expedition. Route Near the Thirty-fifth Parallel, Exploted by Lieutenant A. W. Whipple, Topographical Engineers, in 1853 and 1854. Explorations and Surveys for a Railroad Route from the Mississippi River to the Pacific Ocean. 5. Link to external document.
  Enke, Neela. 2009. Contributions towards a revised infrageneric classification of Crepis (Chicorieae, Compositae). Willdenowia. 39(2):229-245.
  Ewan, Joseph A. 2005. Notes on Louisiana Botany and Botanists, 1718-1975. SIDA, Contributions to Botany. 21(1):2275-2296. https://www.jstor.org/stable/41968527
  Faber-Langendoen, Dom, Todd Keeler-Wolf, Del Meidinger, Dave Tart, Bruce Hoagland, Carmen Josse, Gonzalo Navarro, Serguei Ponomarenko, Jean-Peirre Saucier, Alan Weakley, and Patrick Comer. 2014. EcoVeg: a new approach to vegetation description and classification. Ecological Monographs. 84(4):533-561. {TAS-pdf}
  Faber-Langendoen, Don, Ralph H. Crawford, and David L. Tart. 2009. Commentary: Contours of the Revised U. S. National Vegetation Classification Standard. Bulletin of the Ecological Society of America. {TAS-pdf}
  Fedde, Friedrich Karl Georg. 1909. Papaveraceae-Hypecoideae et Papaveraceae-Paraveroideae. Das Pflanzenreich :regni vegetablilis conspectus. 40. Link to external document.
  Fee, A. L. A. 1852. Mémoires sur les Familles des Fougères; Cinquieme Mémoire, Genera Filicum. Link to external document.
  Ferguson, David J. 1987. Opuntia cymochila Eng. & Big. – A Species Lost in the Shuffle. Cactus and Succulent Journal. 50: 256-260. Link to external document.
  Fernald, M. L. 1906. Some new or little known Cyperaceae of eastern North America. Rhodora. 8(92):161-167. Link to external document.
  Fernald, M. L. 1934. Draba in temperate northeastern America. Rhodora. 36(427, 428, 429, 430):241-261, 285-305, 314-344, 353-371.
  Fernald, M. L. 1943. Virginian Botanizing Under Restrictions. Rhodora; Journal of the New England Botanical Club. 45(538):357-412. Link to external document.
  Fernald, M. L., and C. A. Weatherby. 1929. Proposed Amendments to the International Rules of Botanical Nomenclature. Rhodora. 31(365):91-95. Link to external document.
  Fernandez-Mazuecos, Mario, Jose Luis Blanco-Pastor, and Pablo Vargas. 2013. A Phylogeny of. International Journal of Plant Sciences. 174(2):234-249.
  Federal Geographic Data Committee. 2008. National Vegetation Classification Standard, Version 2. February 2008. {TAS-pdf}
  Idaho Firewise. 2017. Fire Resistance of Plants Master Database. Link to external document. {TAS-pdf}
  Fischer, F. E. T., and Ernst Rudolph von Trautvetter. 1838. Index Quartus. Index seminum, quae Hortus Botanicus Imperialis Petropolitanus pro mutua commutatione offert : accedunt Animadversiones botanicae nonnullae. Link to external document.
  Flann, C (ed). 2009+. Global Compositae Checklist. Accessed: 2016. http://compositae.landcareresearch.co.nz
  Flora of North America Editorial Committee, eds. 1993+. Flora of North America North of Mexico. 16+. New York and Oxford.. Published on the Internet; http://www.theplantlist.org/ (accessed 2013, 2014, etc.)
  Flora of North America Editorial Committee, eds. 2013. Magnoliophyta: Liliidae: Liliales and Orchidales. Flora of North America North of Mexico. 26. New York and Oxford.. http://www.efloras.org/volume_page.aspx?volume_id=1026&flora_id=1
  Flora of North America Editorial Committee, eds. 2005. Caryophyllaceae, Plumbaginaceae, and Polygonaceae. Flora of North America North of Mexico. 5. New York and Oxford.. http://www.efloras.org/volume_page.aspx?volume_id=1005&flora_id=1
  Flora of North America Editorial Committee, eds. 2006. Asteraceae. Flora of North America North of Mexico. 19. Link to external document.
  Franco, João do Amaral. 1950. Cedrus libanensis et Pseudotsuga menziesii. Boletim da Sociedade Broteriana. II. 24: 77-81. Link to external document. Date retrieved: 14 March 2021.
  Frankton, C., and R. J. Moore. 1961. Cytotaxonomy, phylogeny, and Canadian distribution of Cirsium undulatum and Cirsium flodmanii. Canadian Journal of Botany. 39(1):21-33.
  Fraser, John. 1813. A Catalogue of New and Interesting Plants, Collected in Upper Louisiana, and principally on the River Missourie, North America. For sale at Messrs. Fraser's Nursery for Curious American Plants, Sloane Square, King's Road, Chelesea, London. Very rare, but reprinted by E. L. Greene (1892).
  Frean, Millicent, Kevin Balkwill, Cindy Gold, and Sharon Burt. 1997. The expanding distributions and invasiveness of Oenothera in southern Africa. South Africa Journal of Botany. 63(6):449-458. Link to external document.
  Freckmann, Robert W. and Michel G. Lelong. 2002. Nomenclatural Changes and Innovations in Panicum and Dichanthelium (Poaceae: Paniceae). SIDA, Contributions to Botany. 20: 161-174. Link to external document.
  Fremont, John C. 1845. The Exploring Expedition to the Rocky Mountains in the year 1842, and to Oregon and North California in the years 1843-'44. Washington, DC: 1845. Link to external document. {TAS-pdf}
  Fresenius, Georg. 1836. Index Seminum. Frankfort am Main.
  Fribourg, H. A., D. B. Hannaway, and C. P. West. 2009. Tall Fescue for the Twenty-first Century. Agron. Monog. 53. Madison, WI. Date retrieved: 20 November 2019, https://forages.oregonstate.edu/tallfescuemonograph
  Fuentes-Bazan, Susy, Pertti Uotilla, and Thomas Borsch. 2012. A novel phylogeny-based classification for Chenopodium sensu lato, and a tribal rearrangement of Chenopodioideae (Chenopodiaceae). Willdenowia. 42(1):5-24. https://doi.org/10.3372/wi.42.42101
  Gaertner, Joseph. 1788-1807. De Fructibus et Seminibus Plantarum: accedunt seminum centuriae quinque priores cum tabulis Aeneis LXXIX. 3 vols, incl 4 nos.. URL: https://www.biodiversitylibrary.org/page/37173789
  Garcia-Jacas, Nuria, Teresa Garnatje, Alfoonso Susanna, and Rosier Vilatersana. 2002. Tribal and Subtribal Delimitation and Phyogeny of the Cardueae (Asteraceae): A Combined Nuclear and Chloroplast DNA Analysis. Molecular Phylogenetics and Evolution. 22(1):51.64.
  Gernandt, David S., Gretel Geada Lopez, Sol Ortiz Garcia, and Aaron Liston. 2005. Phylogeny and classification of Pinus. Taxon. 54(1):29-42. {TAS-pdf}
  Gernert, W. B. 1937. Variation in Buffalo Grass. Agronomy Journal. 29(3):242-246.
  Geyer, Charles A. 1846. Notes on the Vegetation and general character of the Missouri and Oregon Territories, made during a Botanical Journey in the State of Missouri, and across the South Pass of the Rocky Mountains, to the Pacific, during the years 1843 and 1844. The London Journal of Botany. 5: 22-41, 198-208, 286-&c. 22-41, 198-208, 286-310, 509-524
  Global Invasive Species Database. 2019. Species profile for Bromus inermis. Date retrieved 17 September 2019, http://www.iucngisd.org/gisd/species.php?sc=1223
  Gmelin, Johann Friedrich. 1788-1793. Caroli a Linné. Systema naturae per regna tria naturae : secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Ed. 13., aucta, reformata. Cura Jo. Frid. Gmelin.. Link to external document.
  Gmelin, Johan Georg. 1747-1769. Flora Sibirica sive Historia Plantarum Siberiae. St. Petersburg.
  Gmelin, Karl Christian. 1805. Flora Badensis Alsatica. 1: 8. Link to external document. Date retrieved: 21 March 2021
  Golden, City of. 2019. Revegetation Requirements. {TAS-pdf} Date retrieved: 14 November 2019, https://www.cityofgolden.net/media/COGRevegetationRequirements2019.pdf
  Goodman, George J., and Cheryl A. Lawson. 1995. Retracing Major Stephen H. Long's 1820 Expedition. Norman, OK: University of Oklahoma Press, 1995.
  Gould, Frank W. 1979. The Genus Bouteloua (Poaceae). Annals of the Missouri Botanical Garden. 66(3):348-416.
  Grant, Todd A., Bridgette Flanders-Wanner, Terry L. Shaffer, Robert K. Murphy, and Gregg A. Knutsen. 2009. An Emerging Crisis across Northern Prairie Refuges: Prevalence of Invasive Plants and a Plan for Adaptive Management. Ecological Restoration. 27(1):58-65.
  Grant, Verne. 1956. A Synopsis of Ipomopsis. Aliso. 3(3):351-362. https://scholarship.claremont.edu/aliso/vol3/iss3/9/
  Graustein, Jeannette E. 1967. Thomas Nuttall, Naturalist: Explorations in America. Cambridge, MA: Harvard University Press, 1967. {TAS}
  Gray, Asa. 1835. A notice of some new, rare, or otherwise interesting Plants, from the Northern and Western portions of the State of New York. Annals of the Lyceum of Natural History. 3: 233. Link to external document. Read December, 1834. Date retrieved: 21 March 2021.
  Gray, Asa. 1848. Melanthacearum Americae Septentrionalis Revisio. Annals of the Lyceum of Natural History of New York. 4: 105-140. Link to external document.
  Gray, Asa. 1848. A manual of the botany of the northern United States, from New England to Wisconsin and south to Ohio and Pennsylvania inclusive, (the mosses and liverworts by Wm. S. Sullivant,) arranged according to the natural system. Link to external document. Date retrieved: 21 March 2021.
  Gray, Asa. 1849. Plantae Fendlerianae Novi-Mexicanae; An Account of a Collection of Plants made chiefly in the Vicinity of Santa Fe, New Mexico, by Augustus Fendler;. with Descriptions of the New Species, Critical Remarks, and Characters of other undescribed or little known Plants from surrounding Regions. Memoirs of the American Academy. IV(I):1-116. Link to external document.
  Gray, Asa. 1850. Art. I.—Plantae Lindheimerianae, Part II. An Account of a collection of Plants made by F. Lindheimer in the Western part of Texasm in the Years 1845-6 and 1847-8, with Critical Remarks, Descriptions of new Species, &c. Boston Journal of Natural History. 6(2):141-240. Link to external document.
  Gray, Asa. 1852-1853. Plantae Wrightianae: Texano — Neo – Mexicanae: an account of a collection of plants made by Charles Wright. Smithsonian Contributions to Knowledge, Part 1, Vol. III., Art. 5. and Part 2 Vol. V., Art 6.. in 2 parts. Washington City: Smithsonian Institution, March, 1852 - February, 1853. Link to external document.
  Gray, Asa. 1853. Plantae Wrightianae: Texano — Neo – Mexicanae Part II: an account of a collection of plants made by Charles Wright. Smithsonian Contributions to Knowledge, Part 1, Vol. III., Art. 5. and Part 2 Vol. V., Art 6.. in 2 parts. Washington City: Smithsonian Institution, February, 1853. Link to external document.
  Gray, Asa. 1856. Manual of the botany of the northern United states. New York: George P. Putnam & Co., 1856. https://www.biodiversitylibrary.org/item/106369
  Gray, Asa. 1856. Descriptions of the botanical specimens. Narrative of the expedition of an American squadron to the China Seas and Japan : performed in the years 1852, 1853, and 1854, under the command of Commodore M.C. Perry, United States Navy, by order of the Government of the United States. 2: 305-336. Link to external document.
  Gray, Asa. 1860. Catalogue of Plants Collected East of the Rocky Mountains. “The Pacific Railroad Report”. Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean. 12(2(2)). Link to external document.
  Gray, Asa. 1862. 3. Synopsis of the Genus Pentstemon. Proceedings of the American Academy of Arts and Sciences. 6: 56-. Link to external document.
  Gray, Asa. 1863. Enumeration of the Species of Plants Collected by Dr. C. C. Parry, and Messrs. Elihu Hall and J. P. Harbour, during the Summer and Autumn of 1862, on and near the Rocky Mountains, in Colorado Territory, lat. 39°-41°. Proceedings of the Academy of Natural Sciences of Philadelphia. 15: 55-80. Link to external document.
  Gray, Asa. 1867. Manual of the botany of the northern United States : including the district east of the Mississippi and north of North Carolina and Tennessee, arranged according to the natural system. New York: Ivison, Phinney, Blakeman, 1867. Link to external document.
  Gray, Asa. 1870. 2. Revision of the North American Polemoniaceae. Proceedings of the American Academy of Arts and Sciences. 8: 247-282. Link to external document. Date retrieved: 15 October 2020, 16 January 2021.
  Gray, Asa. 1876a. V. Contributions to the Botany of North America. Proceedings of the American Academy of Arts and Sciences. 12, new v.4: 51-84. Link to external document. Section 2. Characters of New Species, &c., footnote beginning on page 65.
  Gray, Asa. 1876b. V. Miscellaneous Botanical Contributions. Proceedings of the American Academy of Arts and Sciences. 11. Link to external document. New Series, Vol. 3, Whole Series, Vol.11
  Gray, Asa. 1878-1895. Synoptical flora of North America. Ed. l, volume 2, part 1. New York.: Ivison, Blakeman, Taylor and Co.. Link to external document. Dates: 1(1.1): 1-208, Oct. 1895; 1(1.2): 209-506, Jun 1897; 1(2): 1-474, July 1884; 2(1): 1-402, May 1878. Remarks: A. Gray published vols 2(1), 1(2) and a portion of 1(1) before his death. Treatment of the rest of volume 1(1) was left to S. Watson, and subsequently, after his death, to B. L. Robinson, who was assisted by J.¹M. Coulter, W. Trelease & L. H. Bailey
  Gray, Asa. 1880. Contributions to North American Botany: I. Notes on some Compositae. Proceedings of the American Academy of Arts and Sciences. VIII (XVI): 78-108. Boston: University Press: John Wilson and Son, June 9, 1880.
  Gray, Asa. 1884. Syntopical Flora of North America. Caprifoliaceae—Compositae. Vol 1, Pt 2. Link to external document.
  Gray, Asa. 1886. XXIV. Contributions to American Botany, 1. A Revision of the North American Ranunculi.. Proceedings of the American Academy of Arts and Sciences. 13, n.s.: 363-413. Link to external document.
  Gray, Asa. 1895-1897. pp. in Benjamin Lincoln Robinson. Syntopical Flora of North America. Link to external document.
  Gray, Asa, and Charles Wright. 1852. Plantae Wrightianae texano-neo-mexicanae :an account of a collection of plants made by Charles Wright. Washington, DC: Smithsonian Institution, 1852. Link to external document.
  Greene, Edward L. 1885. Studies in the Botany of California and Parts Adjacent. Bulletin of the California Academy of Sciences. 1(3):66-127. Link to external document.
  Greene, Edward L. 1886. Studies in the Botany of California and arts Adjacent - IV. 1. On Some Chicoriaceous Compositae. Bulletin of the California Academy of Sciences. 2(5):41-55. Link to external document.
  Greene, Edward L. 1887. Some West American Asperifoliae. Pittonia. 1: 8-22. Link to external document.
  Greene, Edward L. 1889. Reprint of Fraser's Catalogue. Pittonia. 2: 114-119. URL: https://www.biodiversitylibrary.org/item/52475#page/119/
  Greene, Edward L. 1890. Notes on Ranunculus. Pittonia. 2: 109-111.
  Greene, Edward Lee. 1891-97. Flora Franciscana. An attempt to classify and describe the vascular plants of middle California. San Francisco: Cubery & Co., 1891-97.
  Greene, Edward L. 1893. Novitates Occidentales.-IV. Erythea. a journal of botany, West American and general. 1: 147-153. Link to external document.
  Greene, Edward L. 1894b. Novitates Occidentales -- IX. Erythea: A Journal of Botany, West American and General. 2(12):189-191. Link to external document.
  Greene, Edward L. 1895. Novitates Occidentales. — XI. Erythea. 3(2):46. Link to external document.
  Greene, Edward L. 1897. New or Noteworthy Species – XVIII. Pittonia. 3(16):154-171. Date retrieved: 16 September 2020, https://www.biodiversitylibrary.org/item/52470
  Greene, Edward L. 1898. Studies in the Compositae.—VII. Pittonia. 3(18):264-305. Link to external document.
  Greene, Edward L. 1898b. Some Western Polemoniaceae. Pittonia. 3(18):299-305. Link to external document.
  Greene, Edward L. 1898. New of Noteworthy Species. — XXIII. Pittonia. 3(19):343. Link to external document.
  Greene, Edward L. 1899. West American Asperifoliae–IV. Pittonia. IV(21):86-97. Link to external document.
  Greene, Edward L. 1899b. Neglected Generic Types. - I. Pittonia. 4(20):47. Link to external document.
  Greene, Edward Lee. 1899c. New Species of Sisyrinchium. Pittonia. v(20):32-34. Link to external document.
  Greene, Edward L. 1901. New or Noteworthy Species. — XXIX. Pittonia. 4(25):318-321. https://www.biodiversitylibrary.org/item/52476
  Greene, Edward L. 1901. Plantae Bakerianae. 3(1):35. https://www.biodiversitylibrary.org/item/210254
  Greene, Edward Lee. 1902a. A Fascicle of New Compositae. Pittonia. V(26):54-64. Washington, D. C.: September-November, 1902. {TAS-pdf}
  Greene, Edward L. 1902b. Some New Northwestern Compositae. The Ottawa Naturalist. 15(9):278. Link to external document.
  Greene, Edward L. 1905. Segregates of the Genus Rhus. Leaflets of botanical observation and criticism. 1: 114-144. Link to external document.
  Greene, Edward L. 1906c. The Genus Tridophyllum. Leaflets of Botanical Observation and Criticism. 1: 188-9. Washington, DC. https://www.biodiversitylibrary.org/item/13850
  Gronovius, Jan Frederik, and John Clayton. 1738-1743. Flora Virginica, exhibens plantas. in 2 volumes. Link to external document.
  Gross-Konigsberg, Hugo. 1913. Beiträge zur Kenntnis der Polygonaceen. Botanische Jahrbücher fur Systematik, Pflanzengeschichte und Pflanzengeographie. 49(2):234-. https://www.biodiversitylibrary.org/page/219060#page/252/
  Hábenczyus, Alida A., et al. 2022. Increasing abundance of an invasive C4 grass is associated with larger community changes away than at home. Applied Vegetation Science. 25. https://doi.org/10.1111/avsc.12659
  Hackel, Eduard. 1890. pp. in F. Lamson-Scribner and Effie A. Southworth. Die Naturlichen Pflanzenfamilien. The True Grasses. New York: Henry Holt and Company, 1890. https://www.biodiversitylibrary.org/item/65437
  Häffner, Eva, and Frank H. Hellwig. 1999. Phylogeny of the tribe Cardueae (Compositae) with emphasis on the subtribe Caruinae: an analysis based in ITS sequence data. Willdenowia. 29: 27-39.
  Hall, Harvey M., and Frederick E. Clements. 1923. The phylogenetic method in taxonomy; the North American species of Artemisia, Chrysothamnus, and Atriplex. Carnegie Institution of Washington publication. 326. Washington, D. C.: The Carnegie Institution of Washington, 1923. Link to external document.
  Harrington, H. D. 1954. Manual of the plants of Colorado. Denver, CO.: Sage Books., 1954.
  Harrington, H. D. 1964, 2nd ed.. Manual of the plants of Colorado. Denver, CO.: Sage Books., 1964. {TAS}
  Harrington, H. D. and L. W. Durrell. 1957. How To Identify Plants. Chicago, Illinois: The Swallow Press, Inc., 1957. {TAS}
  Harris, James G., and Melinda Woolf Harris. 2001. Plant Identification Terminology: An Illustrated Glossary. Spring Lake, Utah: Spring Lake Publishing, 2001. {TAS}
  Haworth, Adrian Hardy. 1819. Supplementum plantarum succulentarum :sistens plantas novas vel nuper introductas, sive omissas,. Synopse plantarum succulentarum : cum observationibus variis anglicanis. London: Impensis J. Harding, 1819. Link to external document.
  Hayden, F. V. 1870. Preliminary report of the United States Geological Survey of Wyoming : and portions of contiguous territories, (being a second annual report of progress). Washington, D.C.: Government Printing Office, 1872. Link to external document.
  Hedgem Carl E., Robert S. Houston, Ogden L. Tweto, Zell E. Peterman, Jack E. Harrison, and Rolland R. Reid. 1986. The Precambrian of the Rocky Mountain Region. U. S. Geological Survey Professional Paper. 1241-D. Washington, C. D.: United States Government Printing Office, 1986. {TAS-pdf}
  Heidinga, Lawrence, and Scott D. Wilson. 2002. The Impact of an Invading Alien Grass (Agropyron cristatum) on Species Turnover in Native Prairie. Diversity and Distributions. 8(5):249-258.
  Heimerl, Anton. 1901. Studien uber einige Nyctaginaceen des Herbarium Delessert. Annuaire du Conservatoire et du jardin botaniques de Genève. 4-5: 177-197. Link to external document.
  Heller, A. A. 1897. Notes on Plants of New Mexico. Bulletin of the Torrey Botanical Club. 24(10):477-478. Link to external document.
  Heller, A. A. 1898. Catalogue of North American Plants North of Mexico, Exclusive of the Lower Cryptograms. Lancaster PA. Link to external document. Date retrieved: 13 January 2021.
  Hensel, R. L. 1938. Perfect-Flowered Buffalo Grass (Buchloe Dactyloides). Agronomy Journal. 30(12):1043-1044.
  Henson, James F. 2001. Plant Guide: Tall Fescue. 2001. {TAS-pdf} Date retrieved: 3 October 2019, https://plants.usda.gov/plantguide/pdf/pg_loar10.pdf
  Herrando-Moraira, Sonia, et al. 2019. Nuclear and plastid DNA phylogeny of tribe Cardueae (Compositae) with Hyb-Seq data: A new subtribal classification and a temporal diversification framework. Molecular Phylogenetics and Evolution. 137: 313-332. Complete author list: Herrando-Moraira, Sonia, Juan Antonio Calleja, Mercè Galbany-Casals, Núria Garcia-Jacas, Jian-Quan Liu, Javier López-Alvarado, Jordi López-Pujol, Jennifer R.Mandel, Sergi Massó, Noemí Montes-Moreno, Cristina Roquet, Llorenç Sáez, Alexander Sennikov, Alfonso Susannaa, and Roser Vilatersanaa
  Heywood, Vernon. 2009. João Manuel Antonio Paes do Amaral Franco (25 June 1921 - 8 May 2009). Flora Mediterranea. 19: 343-344. Link to external document. Date retrieved: 14 March 2021
  Hilpold, Andreas, et al. 2014. Phylogeny of the Centaurea group (Centaurea, Compositae) – Geography is a better predictor than morphology. Molecular Phylogenetics and Evolution. 77: 195-215.
  Hitchcock, A. S. 1891. A Catalogue of the Anthophyta and Pteridophyta of Ames, Iowa. (Contributions from the Shaw School of Botany, No. 8). Transactions of the Academy of Science of St. Louis. 5: 477-532. Link to external document.
  Hitchcock, A. S. 1894. A Key to the Spring Flora of Manhattan. Manhattan, Kansas: Mercury Publishing House, 1894. https://www.biodiversitylibrary.org/item/32065
  Hitchcock, A. S. 1895. Note on Buffalo Grass. Botanical Gazette. 20(10):464. {TAS-pdf}
  Hitchcock, A. S. 1920. The Genera of Grasses of the United States: with special reference to the economic species. U. S. D. A. Bulletin 772. https://www.biodiversitylibrary.org/ia/generaofgrasseso772hitc_0/#page/3/mode/1up
  Hitchcock, A. S. 1927. Conservation of the names of grass genera. American Journal of Botany. 14(9):526-531.
  Hitchcock, Albert Spear. 1928. New Species of Grasses from the United States. Proceedings of the Biological Society of Washington. 41: 157-164. Link to external document. Date retrieved: 26 March 2021
  Hitchcock, A. S. 1971. Manual of the Grasses of the United States. Second edition, edited by Agnes Chase. New York: Dover Publications, Inc., 1971. {TAS}
  Holmgren, N. H., & P. K. Holmgren. 1989. A Taxonomic Study of Jamesia (Hydrangeaceae). Brittonia. 41(4):335-. Link to external document.
  Holub, Josef. 1972. Taxonomic and Nomenclatural remarks on Chamaenerion auct. Folia Geobotanica & Phytotaxonomica. 7(1):81-90. No DOI available.
  Holub, Josef. 1998. Reclassifications and new names in vascular plants 1. Preslia, Praha. 70(2):97-122. Link to external document.
  Hooker, Joseph Dalton. 1875. Curtis's Botanical Magazine. 3rd Series. 31. Link to external document.
  Hooker, William J. 1830a. Potentilla gracilis. Tall Upright Conquefoil. Curtis's Botanical Magazine. 57: t. 2984. Link to external document.
  Hooker, William Jackson, Sir. 1837-1841. Icones plantarum or figures, with brief descriptive characters and remarks, of new or rare plants, selected from the author's herbarium. 1-4. Link to external document.
  Hooker, Sir William Jackson. 1829-1840. Flora Boreali-Americana; or the Botany of the Northern Parts of British America. Link to external document. Published at various dates from September 1829 to July 1840. The following dates of publication of the parts as issued are given by B.D. Jackson in Bulletin de l'Herbier Boissier, v.1, p. 298 (1893) : v.1, pt. 1, p. 1-48, 1829; pts. 2 and 3, p. 49-144, 1830; pts. 4-6 concluding v.1, 1834; v.2, pt. 7, p. 1-48, 1834; pt. 8, p. 49-96, 1838; pt. 9, p. 97-144, 1838; pt. 10, p. 145-192 [1838]; pt. 11, p. 193-241, 1839; pt. 12, p. 241-end. 1840.
  Hooker, Sir William J. 1847. Catalogue of Mr. Geyer's Collection of Plants gathered in the Upper Missouri, the Oregon Territory, and the intervening portion of the Rocky Mountains ; by Sir W. J. Hooker, D.C.L., F.R.A. and L.S. The London Journal of Botany. 6: 65-79, 206-256, 458-459. Link to external document. Complete Title: The London journal of botany : containing figures and descriptions of such plants as recommend themselves by their novelty, rarity, history, or uses : together with botanical notices and information and and occasional portraits and memoirs of eminent botanists.
  Hooker, Sir William J. 1853. Catalogue of Mr. Geyer's Collection of Plants gathered in the Upper Missouri, the Oregon Territory, and the intervening portion of the Rocky Mountains ; by Sir W. J. Hooker, D.C.L., F.R.A. and L.S. Hookers journal of botany and Kew Garden miscellany. 5: 257-265. Link to external document. Hooker's jounral of botany and Kew Garden miscellany is a different journal than The London journal of botany.
  Hoot, Sara B., Kyle Meyer, and John C. Manning. 2012. Phylogeny and Reclassification of Anemone (Ranunculaceae), with an Emphasis on Austral Species. Systematic Botany.
  Hopkins, Milton. 1937. Arabis in Eastern and Central North America. Rhodora. 39(459):63-98 , 106-147. Link to external document.
  Horneman, Jens Wilkin. 1815. Hortus regius botanicus Hafniensis, in usum tyronum et botanophilorum. Hafniae (Copenhagen): MDCCCXV (1815). Found on Google books.
  House, Homer D. 1921. Nomenclatural Notes on Certain American Plants - I. American Midland Naturalist. 7(4, 5):126-135. Link to external document.
  Houttuyn, Martinus. 1777. Natuurlyke historie : of, Uitvoerige beschryving der dieren, planten, en mineraalen. 2(8):638. Link to external document.
  Hudson, William. 1762. Gulielmi Hudsoni, Regiae Societatis Socii et Pharmacopaei Londinensis, Flora anglica : exhibens plantas per regnum angliae sponte crescentes, distributas secundum systema sexuale :. cum differentiis specierum, synonymis autorum, nominibus incolarum, solo locorum, tempore florendi, officinalibus pharmacopaeorum. London: Impensis auctoris, 1762. Link to external document.
  Huff, David R., and Lin Wu. 1992. Distribution and inheritance of inconstant sex forms in natural populations of dioecious buffalograss (Buchloe dactyloides). American Journal of Botany. 79(2):207-215.
  Hufford, Larry, Michelle M. McMahon, Anna M. Sherwood, Gail Reeves, and Mark W, Chase. 2003. The major clades of Loasaceae: phylogenetic analysis using the plastid matK and trnL-trnF regions. American Journal of Botany. 90(8):1215-1228. {TAS-pdf}
  Hufford, Larry, John J. Schenk, and Joshua M. Brokaw. 2017. Mentzelia. Flora of North America. 12. Link to external document. Date retrieved: 16 January 2021.
  IPNI. 2015 - 2022 &c.. International Plant Names Index (IPNI). Link to external document. Retireved frequently from the beginning of this project (2015?) through the current date.
  Isely, Duane. 1978. New varieties and combinations in Lotus, Baptisia, Thermopsis, and Sophora (Leguminosae). Brittonia. 30(4):466-472.
  Jabbour, Florian, and Susanne S. Renner. 2012. A phylogeny of Delphinieae (Renunculaeae) shows that Aconitum is nested within Delphinium and that late Miocene transitions to long life cycles in the Himalayas and Southwest China coincide with bursts in diversification. Molecular Phylogenetics and Evolution. 62: 928-942. {TAS-pdf}
  Jacquin, Nicolaus Joseph van. 1776. Hortus botanicus vindobonensis, seu, Plantarum rariorum, quae in Horto botanico vindobonensi ... :coluntur, icones coloratae et succinctae descriptiones. 3 vols.. Vindobonae [Vienna]: Typis Leopoldi Joannis Kaliwoda, aulae imperialis typographi, Vol. 3: Typis Josephi Michaelis Gerold., 1770-1776. Link to external document. Plates colored by F. Scheidl.
  Jacquin, Nikolaus Joseph, Freiherr van. 1781-1793. Icones plantarum rariorum. 3 vols.. Vindobonae [Vienna, Austria]: C. F. Wappler, 1781-1793. Link to external document.
  Jacquin, Nikolaus Joseph. 1796. Collectaneorum Supplementum. Vindobonae [Vienna, Austria]: Ex Officina Wappleriana, 1797. Link to external document.
  Jacquin, Nicolaus J. 1797-1804. Plantarum Rariorum Horti Caesarei Schoenbrunnensis Descriptiones et Icones. Vienna, London. Link to external document.
  James, Edwin, ed. 1823. Account of an Expedition from Pittsburgh to the Rocky Mountains performed in the years 1819, 1820, by order of the Hon. J. C. Calhoun, under the command of Major Stephen H. Long. II. Link to external document. Volume 1: (http://www.biodiversitylibrary.org/item/124314). Volume 2: (https://books.google.com/books?printsec=frontcover&pg=PA256&id=ys5jAAAAMAAJ#v=onepage&q&f=false)
  James, Edwin. 1825. Catalogue of Plants Collected During a Journey to and from the Rocky Mountains, During the Summer of 1820. Transactions of the American Philosophical Society. n.s.(2):172-190. (http://www.biodiversitylibrary.org/item/26092#page/194/mode/1up)
  Jennings, Michael D., Don Faber-Langendoen, Orie L. Loucks, Robert K. Peet,m and David Roberts. 2009. Standards for associations and alliances of the U. S. National Vegetation Classification. Ecological Monographs. 79(2):173-199. {TAS-pdf}
  Jercinovic, Eugene. n.d.. Ninety Years After Greene. Date retrieved: 17 February 2019, http://newmexicoflores.com/E.L.Greene.pdf
  Jercinovic, Gene. n.d.. William Gambel: New Mexico Plant Specimens. Date retrieved: 30 July 2020, http://newmexicoflores.com/william_gambel.pdf
  Johnson, Samuel A., Leo P. Bruederle, and Diana F. Tomback. 1998. A mating system conundrum: hybridization in Apocynum (Apocynaceae). American Jounral of Botany. 85(9):1316-1323.
  Johnston, Ivan M. 1948. Noteworthy Species from Mexico and Adjacent United States, II. Journal of the Arnold Arboretum. 29: 193-197. Link to external document.
  Jones, George Neville. 1946. American Species of Amelanchier. Urbana, Illinois: University of Illinois Press, 1946. {TAS-pdf}
  Jones, Marcus E. 1893. Contributions to Western Botany. Zoe. III(4):283-308. Date retrieved: 21 October 2016. http://www.biodiversitylibrary.org/item/14460
  Jones, Marcus E. n.d.. Botanical Exploration of Marcus E. Jones: 1875 to 1919. {TAS-pdf} (http://www.rsabg.org/documents/research/marcus_jones_1875_1919.pdf, accessed 22 November 2014)
  Kadereit, Gudrun, and Helmut Freitag. 2011. Molecular phylogeny of Camphorosmeae (Camphorosmoideae, Chenopodiaceae): Implications for biogeography, evolution of C4-photosyntheses and taxonomy. Taxon. 60(1):51-78. Link to external document.
  Kalm, Pehr. 1762. En resa til Norra America p a Konglik Swenska Wetenskaps Academiens befallung och publici kostnad. III.. Link to external document. Title: “A trip to North America at the Royal Swedish Academy of Sciences' command and public expense”
  Kartesz, John T., and Kancheepuram N. Gandhi. 1990a. Nomenclatural Notes for the North American Flora. II. Phytologia. 68(6):421-427. Link to external document.
  Kelch, Dean G., and Bruce G. Baldwin. 2003. Phylogeny and ecological radiation of New World thistles (Cirsium, Cardueae – Compositae) based on ITS and ETS rDNA sequence dataa. Molecular Ecology. 12: 141-151.
  Kellogg, Albert. 1863. Lupinus caudatus. Proc. Calif. Acad. Nat. Sci. 2: 197. Link to external document.
  Khoshsokhan-Mozaffar, Maryam, Mahboubeh Sherafati, and Shahrokh Kazempour-Osaloo. 2018. Molecular phylogeny of the tribe Rochelieae (Boraginaceae, Cynoglossoideae) with special reference to Lappula. Ann. Bot. Fennici. 55: 293-308.
  Kiger, Robert W. 2001. New Combinations in Phemeranthus Rafinesque (Portulacaceae. Novon. 11: 319-321. https://www.biodiversitylibrary.org/page/642383#page/318
  Kilburn, Paul D., and Sally L. White. 1992. North Table Mountain: Its History and Natural Features. Morrison, CO: Jefferson County Nature Association, 1992. {TAS-pdf}
  Kim, Changkyun, and Joo-Hwan Kim. 2017. Molecular systematics and historical biogeography of Maianthemum s.s. Americal Journal of Botany. 104(6):939-952. Link to external document.
  Kim, Sang-Chul, Jung Sung Kim, Mark W. Chase, Michael F. Fay, and Joo-Hwan Kim. 2016. Molecular phylogenetic relationships of Melanthiaceae (Liliales) based on plastid DNA sequences. Botanical Journal of the Linnean Society. 181: 567-584. {TAS-pdf}
  Knerr, E. B. 1893. Notes on a variety of Ampelopsis quinquefolia. Botanical Gazette. 18(2):70-71. Link to external document.
  Knight, Kathleen S., Jessica S. Kurylo, Anton G. Endress, J. Ryan Stewart, and Peter B. Reich. 2007. Ecology and ecosystem impacts of common buckthorn (Rhamnus cathartica): a review. Biological Invasions. 9: 925-937.
  Knight, Ora W. 1906. Notes on our Yellow Cypripediums. Rhodora. 8(89):93-94. Link to external document.
  Kunth, Carol Sigismund. 1815-1825. Nova genera et species plantarum :quas in peregrinatione ad plagam aequinoctialem orbis novi collegerunt /descripserunt, partim adumbraverunt Amat. Bonpland et Alex. de Humboldt. 7 volumes. Link to external document.
  Kunth, Karl Sigismund. 1833-1850. Enumeratio plantarum omnium hucusque cognitarum : secundum familias naturales disposita, adjectis characteribus, differentiis et synonymis. 5 vols. Date retrieved: 27 September 2020, https://www.biodiversitylibrary.org/bibliography/67381
  Kuntze, Otto. 1891-1898. Revisio generum plantarum:vascularium omnium atque cellularium multarum secundum leges nomenclaturae internationales cum enumeratione plantarum exoticarum in itinere mundi collectarum ... Leipzig: A. Felix [etc.], 1891-1898. Link to external document.
  Kunze, Gustav. 1851. Die Farnkräuter in kolorirten Abbildungen naturgetreu erläutert und beschreiben (The fern herbs explained and described true to nature in colored illustrations). Leipzig: E. Fleisher, 1840-1851. Link to external document.
  LaFrankie, James V. 1986a. Transfer of the species of Smilacina Desf. to Maianthemum Wigg. (Liliaceae). Taxon. 35: 584-589.
  LaFrankie, James V. 1986b. Morphology and taxonomy of the New World Species of Maianthemum (Liliaceae). Journal of the Arnold Arboretum. 67(4):371-438. Link to external document.
  LaFrankie, James V. 2003. Mainanthemum. Flora of North America. 26. Link to external document.
  Lagasca y Segura, Mariano. 1816. Genera et species plantarum, quae aut novae sunt aut nondum recte cognoscuntur. “Genera et species plantarum, quae aut novae sunt aut nondum recte cognoscuntur”. Link to external document.
  Lagasca, Mariano, and Joseph Rodriguez. 1801. Descripcion do algunas plantas del Rel Jardin Botanico de Madrid por D. Mariano Lagasca y D. Joseph Rodriguez, Alumnos del Establecimiento. Anales de historia natural. 4: 256-. Link to external document.
  Lamarck, Jean-Baptiste. 1783. Encyclopedie Methodique: Botanique. 1. Link to external document.
  Lamarck, Jean-Baptiste. 1786. Encyclopedie Methodique: Botanique. 2. http://www.biodiversitylibrary.org/item/15260
  Lamarck, Jean-Baptiste Pirre Antoine de Monet de. 1791. Tableau encyclopédique et méthodique des trois re`gnes de la nature. Botanique. 1 (1791_. Paris: Panckoucke, 1791. Link to external document. Date retrieved: 26 March 2021
  Lamarck, Jean-Baptiste, and Agustin de Candolle. 1815. Flore franc¸aise, ou, Descriptions succinctes de toutes les plantes qui croissent naturellement en France : dispose´es selon une nouvelle me´thode d'analyse, et pre´ce´de´es par un expose´ des principes e´le´mentaires de la botanique. 5 parts. Paris: Chez Desray, 1815. Link to external document.
  Lamarck, Jean-Baptiste Pierre Antoine de Monet de. 1778. Flore françoise, ou, Description succincte de toutes les plantes qui croissent naturellement en France :. disposée selon une nouvelle méthode d'analyse, & à laquelle on a joint la citation de leurs vertus les moins équivoques en médecine, & de leur utilité dans les arts. Link to external document.
  Lambert, Aylmer Bourke, Esq., F.R.S, F.S.A. 1802. A description of the genus Pinus :illustrated with figures, directions relative to the cultivation, and remarks on the uses of the several specie. Link to external document. Date retrieved: 15 March 2021.
  Lammers, Thomas G. 2016. Edwin James: First Botanist for Iowa (U.S.A.). J. Bot. Res. Inst. Texas. 10(2):475-500. {TAS-pdf}
  Lammers, Thomas G. 2017. Plants seen at Prairie Du Chien in 1824-1826: Notes from the diary of Dr. Edwin James. The Great Lakes Botanist. 56: 28-37. {TAS-pdf}
  Lamson-Scribner, F. 1900. American Grasses. 1. Washington: Government Printing Office., 1900. {TAS-pdf} Dare retrieved: 16 July 2020, URL: https://www.biodiversitylibrary.org/item/52970
  Lane, Meredith A. 1982. Neotypification of Gutierrezia linearifolia Lag. (Compositae: Asterae). Taxon. 31(2):330. Link to external document.
  Lawson, Peter & Son. 1836. The Agriculturalist's manual : being a familiar description of the agricultural plants cultivated in Europe,. including practical observations respecting those suited to the climate of Great Britain, and forming a report of Lawson's Agricultural Museum in Edinburgh. Edinburgh: W. Blackwood, 1836. https://www.biodiversitylibrary.org/item/165048
  Ledebour, Carl (Karl) Friedrich von. 1812. Sex Decades Plantarum Novarum in Imperio Rossico Indigenarum. Me´moires de l'Acade´mie impe´riale des sciences de St. Pe´tersbourg. 5: 514-578. Link to external document.
  Lee, Joongku, Bruce G. Baldwin, and L. D. Gottlieb. 2003. Phylogenetic Relationships among the Primarily North American Genera of Cichorieae (Compositae) based on Analysis of 18S-26S Nuclear rDNA ITS and ETS sequences. Systematic Botany. 28(3):616-626.
  Lehman, Johann G. C. 1818. Plantae e Familiae Asperifoliarum Nuciferae. 2 vols.. Link to external document. Asperifoliae is an archaic name for Boraginaceae.
  Lehman, Johann G. C. 1828-1857. Novarum et minus cognitarum stirpium pugillus I-X, addita enumeratione plantarum omnium in his pugillis descriptarum. 10 vols. Link to external document.
  Lemaire, (Antoine) Charles. 1868. Les Cactees Histoire, Patrie Organes de Vegetation, Inflorescence Culture, etc. Link to external document.
  Lewis, Walter H. 1959. A monograph of the genus Rosa in North America. I R. acicularis. Brittonia. 11(1):1-24. Link to external document.
  Lewis, Walter H., and Barbara Ertter. 2007. Subspecies of Rosa nutkana and R. woodsii (Rosaceae) in Western North Wmaerica. Novon: A Journal for Botanical Nomenclature. 17(3):341-353. Link to external document.
  Leysser, Friedrich Wilhelm von. 1761. Flora Halensis; exhibens plantas circa Halam Salicam crescentes secundum systema sexuale Linnaeanum distributas. Halae Salicae: Sumtibus auctoris, 1761. Link to external document.
  Leysser, Friedrich Wilhelm von. 1783. Flora Halensis : exhibens plantas circa Halam Salicam crescentes secundum systema sexuale Linnaeanum distributas. Halae Salicae: Sumtibus auctoris, 1783. Link to external document.
  Lindley, John. 1820. Rosarum monographia, or, A botanical history of roses : to which is added an appendix for the use of cultivators in which the most remarkable garden varieties are systematically arranged. London: Printed for J. Ridgeway, 1820. Link to external document.
  Lindley, John. 1827. Mimulus floribundus. Botanical Register; Consisting of Coloured Figures of Exotic Plants Cultivated in British Gardens; with their History and Mode of Treatment. London. 13(1125):1928. Link to external document.
  Lindley, John. 1828. Berberis repens. Botanical Reister. No. . Link to external document.
  Link, Heinrich. 1821-1822. Enumeratio plantarum Horti regii botanici berolinensis altera [Enumeration of plants of the Royal Botanic Gardens]. Berlin: G. Reimer, 1821-1822. Link to external document.
  Link, Heinrich Friedrich. 1827-1833. Hortus Regius Botanicus Berolinensis descriptus, ab Henrico Friderico Link. 2 vols. Link to external document. Date retrieved: 25 March 2021.
  Linne´, Carl von. 1753. Species Plantarum. Link to external document. Date retrieved: 17 February 2016, http://www.biodiversitylibrary.org/page/358861
  Linnaeus, Carl. 1756. Centuria Plantarium. Upsaliae: L. M. Hojer, 1755-1756. Link to external document.
  Linnaeus, Carl. 1759. Caroli Linnaei...Systema naturae per regna tria naturae :secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Holmiae: Impensis Direct. Laurentii Salvii, 1758-1759. Link to external document.
  Linnaeus, Carl. 1766-1768. Caroli a Linne´ ... Systema naturae : per regna tria natura, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Holmiae: Laurentii Salvii,, 1766-1768. Link to external document.
  Linne´, Carl von. 1771. Mantissa plantarum : Generum editionis VI. et specierum editionis II. Mantissa plantarum : Generum editionis VI. et specierum editionis II. Holmiae: Impensis Direct. Laurentii Salvii, 1767. Link to external document. The Mantissa plantarum was published originally as an appendix to v.2 of the author's Systema naturae, 12th ed., 1767. The 2d pt. was first published separately in 1771.
  Linne´, Carl von. 1782. Supplementum plantarum Systematis vegetabilium editionis decimae tertiae, Generum plantarum editionis sextae, et Specierum plantarum editionis secunda. Brunsvigae [Brunswick, W. Germany]: Impensis Orphanotrophei, 1781. Link to external document.
  Linne, Carl von, and Lars Salvius. 1763. Species plantarum (ed. 2). 2 vols. https://www.biodiversitylibrary.org/bibliography/11179
  Lipscomb, Barney. 1993. Pseudotsuga. Flora of North America. 2. Link to external document. Date retrieved: 16 March 2021.
  Lis, Richard. 2015. Holodiscus. Flora of North America North of Mexico. 9. Link to external document. Date retrieved: 13 January 2021
  Little, Elbert L. 1952. The Genus Pseudotsuga (Douglas-fir) in North America. Leaflets of Western Botany. VI(10):181-197. Link to external document. Date retrieved: 16 March 2021.
  Loiseleur-Deslongchamps, J. L. A. 1809. Suite de la Notice sur les plantes à ajouter à la Flore de France (Flora Gallica ),avec quelques corrections et observations. Journal de botanique, rédigé par une société de botanistes. Paris: G. Dufour, impr. de J.B. Sajou, 1808-1809. Link to external document. Edited by Desvaux, A.-N. 1784-1856. Succeeded by: Journal de botanique appliquée à l'agriculture, à la pharmacie, à la médecine et aux arts .
  Löve, Áskell, and Doris Löve. 1976. Nomenclatural Notes on Arctic Plants. Bot. Notiser. 128: 497-523.
  Löve, Áskell. 1980a. IOPB Chromosome Number Reports LXVI. Taxon. 29(1):163-169. Link to external document.
  Löve, Áskell. 1980b. Chromosome Number Reports LXVIII. Taxon. 29(4):533-547. Link to external document.
  Löve, Áskell. 1982a. IOPB Chromosome Number Reports LXXIV. Taxon. 31(1):119-128. Link to external document.
  Lunell, J. 1915. The Vascular Plants of North Dakota. — III. The American Midland Naturalist. 4(6):229-243. Link to external document.
  Mabry, Makenzie E., and Michael G. Simpson. 2018. Evaluating the Monophyly and Biogeography of Cryptantha (Boraginaceae. Systematic Botany. 43(1):53-76. {TAS-pdf}
  Mackenzie, Kenneth Kent. 1905. Onosmodium. Bulletin of the Torrey Botanical Club. 32(9):495-506. Link to external document.
  Mackenzie, Kenneth K. 1913. Western Allies of Carex pennsylvanica. Torreya. 13(1):14-16. Link to external document. Date retrieved: 1 February 2021
  MacMillan, Conway. 1892. The Metaspermae of the Minnesota Valley : a list of the higher seed-producing plants indigenous to the drainage-basin of the Minnesota River. Reports of the survey (Geological and Natural History Survey of Minnesota)., Botanical series. 1.
  Majure, Lucas C., Paul Puente, M. Patrick Griffith, Walter S. Judd, Pamela S. Soltis, and Douglas E. Soltis. 2012. Phylogeny of Opuntia (Cactaceae): Clade delineation, geographic origins, and reticulate evolution. American Journal of Botany. 99(5):847-864. Link to external document.
  Mao, Kangshan, Gang Hao, Lianquan Liu, Robert P. Adams, and Richard I. Milne. 2010. Diversification and biography of Juniperus (Cupressaceae): variable diversification rates and multiple intercontinental dispersals. New Phytologist. 188(1):254-272. https://doi.org/10.1111/j.1469-8137.2010.03351.x
  Marcy, Randolph B. 1854. Exploration of the Red River of Louisiana. Exploration of the Red River of Louisiana. Washington: A. O. P. Nicholson, Public Printer, 1854. URL: https://www.biodiversitylibrary.org/item/95580
  Marshall, Humphry. 1785. Arbustrum Americanum : The American grove, or, An alphabetical catalogue of forest trees and shrubs, natives of the American United States, arranged according to the Linnaean system :. containing, the particular distinguishing characters of each genus, with plain, simple and familiar descriptions of the manner of growth, appearance, &c. of their several species and varieties. :. Philadelphia: Printed by Joseph Crukshank, in Market-Street, between Second and Third-Streets, 1785. Link to external document.
  Mason-Gamer, Roberta J., Melissa M. Burns, and Marianna Naum. 2010. Reticulate Evolutionary History of a Complex Group of Grasses: Phylogeny of Elymus StStHH Allotetraploids Based on Three Nuclear Genes. PLoS One. 5(6). Link to external document. Date retrieved: 27 January 2021.
  Maximowicz, C. J. 1879. Adnotationes de Spiraeaceis. Trudy Imperatorskago S.-Peterburgskago botanicheskago sada.Acta Horti Petropolitani. 6: 107. Link to external document.
  Mayr, Heinrich. 1890. Die Waldungen von Nordamerika: ihre Holzarten, deren Anbaufähigkeit und forstlicher Werth für Europa im Allgemeinen und Deutschland insbesonders. Nach im Auftrage des Kgl. Bayerischen Staatsministeriums der Finanzen unternommenen Reisen und Studien. München: M. Rieger, 1890. Link to external document. Date retrieved: 15 March 2021
  Medikus, Friedrich Kasimir. 1786. Versuch einer neuen Lehrart die Pflanzen nach zwei Methoden zugleich, nehmlich nach der künstlichen und natürlichen, zu ordnen, durch ein Beispiel einer natürlichen Familie erörtert. Vorlesungen der Churpfälzischen physicalisch-öconomischen Gesellschaft. 2. Link to external document.
  Merrill, E. D. 1938. Biographical Memoir of Nathaniel Lord Britton. National Academy of Sciences Biographical Memoirs. 19. Link to external document.
  Merrill, E. D. 1948. Nomenclatural Notes on Rafinesque's Published Papers 1804-1840. Journal of the Arnold Arboretum. 29(2):202-213. Link to external document.
  Miao, Bomao, Billie L. Turner, and Tom Mabry. 1995. Chloroplast DNA variations in sect. Cyclachaena of Iva (Asteraceae). American Journal of Botany. 87(7):919-923.
  Michaux, Andre. 1803. Flora boreali-americana :sistens caracteres plantarum quas in America septentrionali collegit et detexit Andreas Michaux. in 2 volumes. Date retrieved: 21 July 2020: URL: https://www.biodiversitylibrary.org/item/7567
  Miller, Allison J., David A. Young, and Jun Wen. 2001. Phylogeny and biogeography of Rhus (Anacardiaceae) based on ITS sequence data. International Journal of Plant Sciences. 162(6):1401-1407. Paris: 1803.
  Miller, Philip. 1754. The Gardeners Dictionary, 4th edition. Link to external document. Full title: The Gardeners Dictionary: containing the methods of cultivating and improving all sorts of trees, plants, and flowers, for the kitchen, fruit, and pleasure gardens, as also those which are used in medicine : with directions for the culture of vineyards, and making of wine in England : in which likewsie are included the practical parts of husbandry ...4th ed., corrected and enlarged. London
  Miller, Philip. 1768. The gardeners dictionary, 8th ed. London: Printed for the author and sold by John and Francis Rivington, 1768. Link to external document.
  Monsen, Stephen B., Richard Stevens, and Nancy Shaw. 2004. Grasses. Restoring Western Ranges and Wildlands. RMRS-GTR-136. 2: 295-424.
  Moquin-Tandon, Alfred. 1840. Chenopodearum monographica enumeratio. Paris: P.-J. Loss, 1840. Link to external document.
  Morales-Briones, Diego F., et al. 2021. Disentangling Sources of Gene Tree Discordance in Phylogenomic Data Sets: Testing Ancient Hybridizations in Amaranthaceae s.l. Systematic Biology. 70(2):219-235. Link to external document.
  Morgan, David R., and Ronald L. Hartman. 2003. A Synopsis of Machanthera (Asteraceae: Astereae), with recognitions of Segregate Genera. SIDA, Contributuions to Botany. 20: 1387-1416. Link to external document.
  Mosyakin, Sergei L. 2016. Nomenclatural Notes on North American Taxa of Anemonastrum and Pulsatilla (Ranunculaceae), with Commonts on the Circumstriction of Anemone and Related Genera. Phytoneuron. 2016-79: 1-12. Link to external document.
  Mosyakin, Sergei L., and Oksana G. Yavorska. 2002. The Nonnative Flora of the Kiev (Kyiv) Urban Area, Ukraine: A Checklist and Brief Analysis. Urban Ecology. 1(1):45-65. {TAS-pdf}
  Moulton, Gary E. 1999. Herbarium of the Lewis & Clark Expedition. The Journals of the Lewis & Clark Expedition. 12. 1999.
  Muhlenberg, Henry. 1813. Catalogus plantarum Americae Septentrionalis : huc usque cognitarum indigenarum et cicurum. [A catalogue of the hitherto known native and naturalized plants of North America, arranged according to the sexual system of Linnaeus]. Lancaster, PA: William Hamilton, 1813. Link to external document. "Actually published about Oct. 12, 1813. Copy sent to Stebben Elliott on that date; see Muhlenberg's letter of Nov. 7, 1813 to Elliott. Ed.M."--Note on end sheet of Arnold Arboretum copy.
  Mulligan, Gerald A. 1966. Two new species of Physaria (Cruciferae) in Colorado. Canadian Journal of Botany. 44: 1661-1665. {TAS-pdf}
  Mummenhoff, Klaus, Andreas Franzke, and Marcus Koch. 1997. Molecular phylogenetics of Thlaspi s.l. (Brassicaceae) based on chloroplast DNA restriction site variation and sequences of the internal transcribed spacers of nuclear ribosomal DNA. Canadian Journal of Botany. 75(3):469-482. {TAS-pdf} doi:10.1139/b97-051
  Munz, Philip A. 1931. Studies in Onagraceae VII. The subgenus Pachylophis of the genus Oenothera. American Journal of Botany. 18(9):728.
  Munz, Philip A. 1965. A California Flora. Berkeley, CA: University of California Press. 1681 p.
  Murakami, Atsushi, Branka Javornik, Paige Darby, and Maria Pais. 2006. Molecular phylogeny of wild Hops, Humulus lupulus L. Heredity. 97: 66-74.
  Nees von Esenbeck, Christia Gottfried Daniel. 1841. Florae Africae Australioris Illustrationes Monographicae. Link to external document.
  Nelson, Aven. 1896. First Report on the Flora of Wyoming. Wyoming Experiment Station, Bulletin No. 28. Laramie, Wyoming. Link to external document.
  Nelson A. 1898. The Rocky Mountain species of Thermopsis. Botanical Gazetta. 25: 275-276.
  Nelson, Aven. 1898a. New Plants from Wyoming.—II.*. Bulletin of the Torrey Botanical Club. 25(5):275-283. https://www.biodiversitylibrary.org/page/10418174#page/342/
  Nelson, Aven. 1902. Contributions from the Rocky Mountain Herbarium. IV. Botanical Gazetta. 34: 355-371. Link to external document.
  Nelson, Aven, and T. D. A. Cockerell. 1903. Three New Plants from New Mexico. Proceedings of the Biological Society of Washington. 16: 45-46. Link to external document.
  Nelson, Aven, and J. Francis Macbride. 1913. Western Plant Studies. II. Botanical Gazette. 56(6):469-479. Link to external document.
  Nesom, Guy L. 1989. Infrageneric taxonomy of New World Erigeron (Compositae: Astereae). Phytologia. 67: 67-93.
  Nesom, Guy L. 1994. Review of the taxonomy of Aster sensu lato (Asteraceae: Astereae), emphasizing the new world species. Phytologia. 77(3):141-297. Link to external document.
  Nesom, Guy L. 2004. Taxonomic reevaluations in North American Erigeron (Asteraceae: Astereae). SIDA. 21(1):19-39.
  Nesom, Guy L. 2008. Classification of Subtribe Conyzinae. Lundellia. 11: 8-38.
  Nesom, Guy L., and Gary I. Baird. 1993. Completion of Ericameria (Asteraceae: Astereae), Diminution of Chrysothamnus. Phytologia. 75(1):74-93. {TAS-pdf}
  New York Botanical Garden. 1905-1949. North American Flora. New York: New York Botanical Garden, 1905-1949. Link to external document.
  Nuttall, Thomas. 1813. A Catalogue of New and Interesting Plants, Collected in Upper Louisiana, and principally on the River Missouri, North America. Fraser's Nursery Catalogue. reprinted in Pittonia. 2: 116-119. Link to external document.
  Nuttall, Thomas. 1817. Description of Collinsia, a new genus of plants. Journal of the Academy of Natural Sciences of Philadelphia. 1(1):189-193. Link to external document.
  Nuttall, Thomas. 1818. The Genera of North American Plants and a catalogue of the species to the year 1817. 2 Vols.. Philadelphia: 1818. Link to external document. {TAS-pdf} Retrieved 22 February 2016,
  Nuttall, Thomas. 1821. A Description of some new species of Plants, recently introduced into the gardens of Philadelphia, from the Arkansa territory. Journal of the Academy of Natural Sciences of Philadelphia. 2: 114. Link to external document. Date retrieved: 10 August 2020, URL:
  Nuttall, Thomas. 1825. Observations on a species of Anemone, of the section Pulsatilla, indigenous to the United States.. Journal of the Academy of Natural Sciences of Philadelphia. 5(1):158-159. Link to external document.
  Nuttall, Thomas. 1834a. A Catalogue of a Collection of Plants made chiefly in the Valleys of the Rocky Mountain or Northern Andes, towards the sources of the Columbia River, by Mr. Nathaniel B. Wyeth, and described by T. Nuttall. Journal of the Academy of Natural Sciences of Philadelphia. 7(I):1-60. Link to external document.
  Nuttall, Thomas. 1834b. Collections towards a Flora of the Territory of Arkansa. Transactions of the American Philosophical Society. Read before the Amperical Philosophical Society April 4, 1834. Published 1937.. 5 New Series: 139-203. Philadelphia, PA: 1837. Link to external document. Read April 1, 1834. IPNI shows publication year as 1836. Date retrieved 11 Sep 2020,
  Nuttall, Thomas. 1840-1841. Descriptions of new Species and Genera of Plants. Transactions of the American Philosophical Society. II(7):400. Link to external document. Full title: “Descriptions of new Species and Genera of Plants in the natural Order of the Compositae, collected in a Tour across the Continent to the Pacific, a Residence in Oregon, and a Visit to the Sandwich Islands and Upper California, during the Years 1834 and 1835.”
  Nuttall, Thomas. 1842-1849. The North American Sylva. Link to external document. Published as Volume 4 of Michaux and Nuttall's North American Sylva
  Nuttall, Thomas. 1848a. Descriptions of Plants collected by Mr. William Gambel in the Rocky Mountains and Upper California. Proceedings of the Academy of Natural Sciences of Philadelphia. IV: 7-26. Philadelphia: Printed for the Academy, by Merrihew & Thompson, 7 Carter's Alley., 1848, 1849. Link to external document.
  Nuttall, Thomas. 1848b. Art. XIII. — Descriptions of Plants collected by William Gambel, M. D., in the Rocky Mountains and Upper California. Journal of the Academy of Natural Sciences of Philadelphia. Second Series. 1: 149-190. Philadelphia: 1847-1850. Link to external document.
  Oakes, William. 1842. Catalogue of Vermont Plants. Link to external document.
  Ogle, D. G., L. St. John, J. S. Peterson, and D. J. Tilley. 2009. Plant guide for blue flax (Linum perenne) and Lewis flax (). Boise, ID: USDA-Natural Resources Conservation Service., January 2001. Link to external document. {TAS-pdf}
  Ogle, D. G., L. St. John, and S. R. Winslow. 2009. Plant guide for western wheatgrass (Pascopyrum smithii). Boise, ID: USDA-Natural Resources Conservation Service, October 2009. Link to external document.
  Oh, Sang-Hun, and Daniel Potter. 2005. Molecular phylogenetic systematics and biogeography of tribe Neillieae (Rosaceae) using DNA sequences of cpDNA, rDNA, and LEAFY. American Journal of Botany. 92(1):179-192. Link to external document.
  O'Kane, Steve L. 1988. Colorado's Rare Flora. Great Basin Naturalist. 48(4):433-484. Link to external document.
  O'Leary, N., M. E. Mulgura, & O. Morrone. 2010. Revision Taxonomica de los Expecies del Genero Verbena (Verbenaceae). II: Serie Verbena. Annals of the Missouri Botanical Garden. 97(3):365-424. Link to external document.
  Oliphant, J. Olin. 1934. The Botanical Labors of the Reverend Henry H. Spalding. The Washington History Quarterly. 25(2):93-102. Link to external document. Date retrieved: 2 October 2020,
  Ornduff, Robert, and Marion S. Cave. 1975. Geography of pollen and chromosomal heteromorphism in Leucocrinum montanum (Liliaceae). Madroño. 23(2):65-67. {TAS-pdf}
  Ortega, Casmiro Gomez. 1797. Novarum aut Rariorum Plantarum Horti Reg. botan. Matrit. descriptionum decades, cum nonnullarum iconibus. Link to external document.
  Osterhout, George E. 1918. A new Hymenopappus from Colorado. Torreya. 18(5):90. Link to external document.
  Osterhout, George F. 1901a. Mentzelia aurea. Bulletin of the Torrey Botanical Club. 28(11):644. Link to external document.
  Osterhout, George F. 1901b. A corrected name, Mentzelia speciosa. Bulletin of the Torrey Botanical Club. 28(12):689. Link to external document.
  Ownbey, Gerald B. 1958. Monograph of the genus Argemone for North America and the West Indies. Memoirs of the Torrey Botanical Club. 21: 1-159. Link to external document. Date retrieved: 27 February 2021.
  Pague, Christopher A., Renee Rondeau, and Mark Duff. 1993. North Table Mountain. Natural Heritage Inventory of Jefferson County, Colorado. Boulder, CO: Colorado Natural Heritage Program, 18 March 1993. {TAS-pdf}
  Parry, Charles C. 1862. Physiographical Sketch of [a] Portion of the Rocky Mountain Range. American Journal of Science and Arts. 33. Link to external document. Includes “Enumeration of the Plants; by A. Gray, aided by notes of Drs. Engelmann and Torrey, and upon the habitats, &c., by Dr. Parry.”
  Paula-Souza, Juliana, and Harvey E. Ballard, Jr. 2014. Re-establishment of the name Pombalia, and new combinations from the polyphyletis Hybanthus (Violaceae). Phytotaxa. 183(1):1-15. Available through ResearchGate.
  Payson, Edwin Blake. 1927. A Monograph of the section Oreocarya of Cryptantha. Annals of the Missouri Botanical Garden. 14(s):211-. Link to external document.
  Pennell, Francis W. 1919c. Scrophulairaceae of the Local Flora. III. Torreya. 19(9):161-171. Link to external document.
  Pennell, Francis W. 1921. Scrophulariacea of the West Gulf States. Proceedings of the Academy of Natural Sciences of Philadelphia. 73: 459-536. Link to external document.
  Pennell, Francis W. 1921b. Veronica in North and South America. Rhodora. 23(265, 266):1-22, 29-40. Link to external document.
  Pennell, Francis W. 1935. The Scrophulariaceae of Eastern Temperate North America. Monographs. 1. Philadelphia, PA: Academy of Natural Sciences of Philadelphia, November 27, 1935.
  Perry, Lily M. 1933. A Revision of the North American Species of Verbena. Annals of the Missouri Botanical Garden. 20(2):239-. Link to external document.
  Peterson, Paul M., and Konstatin Romaschenko. 2015. Phylogeny and subgeneric classification of Bouteloua with a new species, B. herrera-arrietae (Poaceae: Chloridoideae: Cynodonteae: Boutelouinae). Journal of Systematics and Evolution. 54(4):351-366. {TAS-pdf}
  Peterson, Paul M., Konstantin Romaschenko, Yolanda Herrera Arrieta, an Jeffrey M. Saarela. 2014. A molecular phylogeny and new subgeneric classification of Sporobolus (Poaceae: Chloridoieae: Sporobolinae). Taxon. 63(6):1212-1243. https://doi.org/10.12705/636.19
  Peterson, Paul M., Konstatin Romaschenko, and Gabriel Johnson. 2010. A phylogeny and classification of the Muhlenbergiinae (Poaceae: Chloridoideae: Cynodonteae) based on plastid and nuclear DNA sewuances. American Journal of Botany. 97(9):1532-1554.
  Peterson, Paul M., Konstantin Romaschenko, Robert J. Soreng, and Jesus Valdés Reyna. 2019. A key to the North American genera of Stipeae (Poaceae, Pooideae) with descriptions and taxonomic names for species of Eriocoma, Neotrinia, Oloptum, and five new genera: Barkworthia, ×Eriosella, Pseudoeriocoma, Ptilagrostiella, and Thorneochloa. Phytokeys. 126: 89-125. Link to external document.
  Piehl, Martin A. 1965. The Natural History and Taxonomy of Comandra (Santalaceae). Memoirs of the Torrey Botanical Club. 22: 1-101. https://www.biodiversitylibrary.org/item/243041
  Pinkava, Donald J. 2003. Opuntia. Flora of North America. 4. Link to external document.
  Piper, Charles V. 1906. Flora of the State of Washington. Contributions from the United States National Herbarium. 11: 1-619.
  Plank, E. N. 1892. Buchloe dactyloides, Englm., not a Dioecious Grass. Bulletin of the Torrey Botanical Club. XIX(10):303-306. {TAS-pdf}
  Plantae Consulting Services. 2002. Vegetation Survey Report. National Revewable Energy Laboratory, South Table Mountain Site. June 29, 2002.
  Plukenet, Leonard. 1696. Almagestum botanicum …. London: 1696. https://bibdigital.rjb.csic.es/idurl/1/10874
  Porter, J. Mark. 1998. Aliciella, A Recircumscribed Genus of Polemoniaceae. Aliso: A Journal of Systematic and Evolutionary Botany. 17(1):23-46. https://scholarship.claremont.edu/cgi/viewcontent.cgi?article=1287&context=aliso
  Porter J. Mark, and Leigh A. Johnson. 2000. A phylogenetic classification of Polemoniaceae. Aliso. 19(1):55-91. https://scholarship.claremont.edu/aliso/vol19/iss1/6/
  Porter, Thomas C. 1870. V.—Catalogue of Plants. Preliminary report of the United States Geological Survey of Wyoming : and portions of contiguous territories, (being a second annual report of progress). Washington: Government Printing Office, 1870. Link to external document. This catalogue embraces the plants collected in Wyoming Territory, by Dr. F. V. Hayden, during the geological survey of 1870 — at Camp Carlin, from July 25 to 30, on the route from Fort D. A. Russell, via Fort Fetterman, Sweetwater, South Pass, Wind Eiver Mountains, and Green River, to Fort Bridger, from August 1 to September 13 ; in the Uinta Mountains, south of Henry's Fork of Green River, in the latter half of September, and on Henry's Fork, in the month of October. To these are added his collection in the North Park, Colorado Territory, August, 1868, and another, made by Mr. B. H. Smith, in the region around the city of Denver, during the summer of 1869.
  Porter, Thomas C. 1894. Scutellaria resinosa Torr. Bulletin of the Torrey Botanical Club. 21(4):177. Link to external document.
  Porter, Thomas C., and John M. Coulter. 1874. Synopsis of the Flora of Colorado. Washington: Government Printing Office, March 20, 1874. Link to external document.
  POWO. 2021 - 2023. Plants of the World Online. Facilitated by the Royal Botanic Gardens, Kew.. Link to external document. Retrieved on numerous dates from 26 February 2021 through today.
  Presl, Carl B. 1830-1835. Reliquiae Haenkeanae, seu, Descriptiones et icones plantarum :quas in America meridionali et boreali, in insulis Philippinis et Marianis collegit Thaddaeus Haenke. Prague: Apud J. G. Calve, 1830-1835. Link to external document.
  Presl, Jan Svatopluk, anf K. B. Presl. 1819. Flora Cechica: indicatis medicinalibus, economicis technologicisque plantis - Kwetena Ceská: spoznamenánjm lekarsých, hospodarských a remeselnických rostlin. Pragae (Prague): In comissis apud J.G. Calve, 1819. Link to external document.
  Presl, Karl B. 1845. Hymenophyllaceae. Abhandlungen der Königlichen Böhmischen Gesellschaft der Wissenschaften. 5(3):93-160, 552-584. Link to external document.
  Price, Alan B., and Alan E. Amen. 2008 rev.. Soil Survey of Golden Area, Colorado: Parts of Denver, Douglas, Jefferson, and Park Countirs. 2001, 2008 rev.. {TAS-pdf}
  Pringle, James S. 1993+. Clematis. Flora of North America North of Mexico. 3. Date of publication of this volume unknown. http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=107312
  Pritzel, Georg A. 1842. Anemonarum Reviso. Linnaea : Ein Journal für die Botanik in ihrem ganzen Umfange. 15(6):561-. Link to external document.
  Prosperi, Jean-Marie, Eric Jenczewski, Marie-Helene Muller, Stephane Fourtier, Jean-Paul Sampoux, and Joelle Ronfort. 2014. Alfalfa domestication history, genetic fiversity, and genetic resources. Legume Perspectives. 4: 13-14. Link to external document. Date retrieved: 3 January 2023.
  Pursh, Frederick. 1814. Flora Americae Septentrionalis; or, A Systematic Arrangement and Description of the Plants of North America. 1. London: White, Cochrane, and Co., 1814. Link to external document. Date retrieved: 24 February 2016. biodiversitylibrary.org/item/1987
  Pursh, Frederick. 1816. Flora Americae Septentrionalis; or, A Systematic Arrangement and Description of the Plants of North America. 2. London: White, Cochrane, and Co., 1816. Link to external document. Date retrieved: 24 February 2016. https://biodiversitylibrary.org/item/1987
  Quinn, James A. 1991. Evolution of Dioecy in Buchloe dactyloides (Gramineae): Tests for Sex-Specific Vegetative Characters, Ecological Differences, and Sexual Niche-Partitioning. American Journal of Botany. 78(4):481-488.
  Rafinesque, C. S. 1808. Essential Generic and Specific Characters of some new Genusses and Secies of Plants observed in the United States of America, in 1803 and 1804. By Mr. C. G. Rafinesque Schmatlz. In a Communitcation to Dr. Mitchill, dated Palermo, Sept. 1st. 1807. The Medical repositiry. Hexade 2. 5: 356-363. Link to external document.
  Rafinesque, C. S. 1817. Florula Ludoviciana. Flora of Louisiana. By Robin and Rafinesque. With a supplement and appendix. New York: C. Wiley & Co., 1817. Link to external document.
  Rafinesque, C. S. 1818a. Art. 2. Flora American Septentrionalis, or a systematic arrangement and description of the Plants of North America, &c. By Frederick Pursh, 2 vols. 8vo. With 24 Engravings. London, 1814. The American Monthly Magazine and Critical Review. 2(2):170-176. {TAS-pdf}
  Rafinesque, C. S. 1818b. Art. 3. Flora American Septentrionalis, or a systematic arrangement and description of the Plants of North America, &c. By Frederick Pursh, 2 vols. 8vo. With 24 Engravings. London, 1814. The American Monthly Magazine and Critical Review. 2(4):265-269. {TAS-pdf}
  Rafinesque, C. S. 1819. Art. 3 [a review of ] The Genera of North-American Plants and a Catalogue of the Species to the year 1817. The American monthly magazine and critical review. 4: 184-196. Date retrieved: 16 July 2020, URL: https://babel.hathitrust.org/cgi/pt?id=nyp.33433081752598
  Rafinesque, C. S. 1819. Des nouveaux Genres de Plantes observes in 1817 et 1818 dans l'interior des Etats-Unis d'Amerique. Journal de Physique, de Chimie, d'Histoire Naturelle et des Arts. 89: 96-107. Link to external document.
  Rafinesque, C. S. 1820. D'un nouveau genre de Plantes, Enemion, et Remarques botaniques. Journal de Physique, de Chimie, d'Histoire Naturelle et des Arts. t. 91: 70. Link to external document.
  Rafinesque, C. S. 1832. Twenty new genera of plants from the Oregon Mountains, &c. Atlantic Journal, and Friend of Knowledge. Philadelphia, PA. (http://www.biodiversitylibrary.org/item/104571#page/155/mode/1up)
  Rafinesque, Constantine Samuel. 1833. Herbarium Rafinesquianum. Philadelphia: 1833, 1833. Link to external document.
  Ray, John. 1686. Historia Plantarum. London: Clark, 1686. Date retrieved: 24 May 2020, https://www.biodiversitylibrary.org/item/124499
  Regel, Eduard. 1850. Datura Wrightii Hort. Gartenflora. 8: 193-194, t. 260. Link to external document.
  Regel, E. 1883. B. Descriptiones et emendationes plantarum bucharicarum turkestanicarumque. Trudy Imperatorskago S.-Peterburgskago botanicheskago sada.Acta Horti Petropolitani. 8(3):Fascicle IX. 645-712. Link to external document.
  Reveal, James L. 1968. On the Names in Fraser's 1813 Catalogue. Rhodora. 70: 25-54.
  Reveal, James L. 2004. New Entities in Eriogonum (Polygonaceae: Eriogonoideae). Phytologia. 86(3):121-159.
  Reveal, James L. 2004a. Nomenclatural Summary of Polygonaceae Subfamily Eriogonoideae. Harvard Papers in Botany. 9(1):143-230. https://www.jstor.org/stable/41761686
  Reveal, J. L. 2005. Eriogonum. Flora of North America North of Mexico. 5. Date retrieved: 16 Jul 2018: http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=112045
  Reveal, James L., Gary E. Moulton and Alfred E. Schuyler. 1999. The Lewis and Clark Collections of Vascular Plants: Names, Types, and Comments. Proceedings of the Academy of Natural Sciences of Philadelphia. 149: 1-64. {TAS-pdf} Stable URL: http://www.jstor.org/stable/4065037, accessed 13 September 2014.
  Richards, Edward Leon. 1968. A monograph of the genus Ratibida. Rhodora. 70: 348-393.
  Richardson, John. 1823. Botanical Appendix. pp. 729-763 in Franklin, John. Narrative of a Journey to the Shores of the Polar Sea. London: John Murray, 1823. Link to external document.
  Rickett, H. W., and F. A. Stafleu. 1959. Nomina generica conservanda et rejicienda spermatophytorum. Taxon. 8(7):213-243. {TAS-pdf} Translated name, “The conservation and rejection of the generic names of spermatophytes”
  Riley, Charles V., ed. 1870. Poisonous Plants. The American Entomologis and Botanist. 2(7):220. Link to external document.
  Roalson, Eric C., Jocelyn C. Hall, James P. Riser II, Warren M. Cardinal-McTeague, Theodore S. Cochrane & Kenneth J. Sytsma. 2015. A revision of generic boundaries and nomenclature in the North American Cleomid clade (Cleomaceae). Phytotaxa. 205(3):129-144.
  Robin, C. C. (Charles-Ce´sar). 1817. Florula Ludoviciana, or, A flora of the state of Louisiana. Translated, revised and improved by C. S. Rafinesque.. New York: C. Wiley & Co., 1817. https://www.biodiversitylibrary.org/item/275247
  Robinson, B. L. 1908. Notes on the Vascular Plants of the Northeastern United States. Rhodora. 10(110):29-34. Link to external document.
  Roemer, Johann Jacob, and Josef August Schultes. 1817-1830. Systema vegetabilium [...] Editio nova [...] Volumen quartum. Stuttgardtiae: J. G. Cottae, 1817-1830. Link to external document.
  Roemer, M. J. 1847. Synopsis monographica Rosiflorarum familias naturales Amygdalacearum et Pomacearum continens secindum genera et species digestas. Familiarum naturalium regni vegetabilis synopses monographicae; seu, Enumeratio omnium plantarum hucusque detectarum secundum ordines naturales, genera et species digestarum, additis diagnosibus, synonymis, novarumque vel minus cognitarum descriptionibus. III. Link to external document. Date retrieved: 11 May 2020,
  Ro¨mer, Johann Jacob, Joseph August Schultes, Julius Hermann Schultes, Jurt Polycarp Joachim Sprengel, and J. G. Cotta. 1820. Caroli a Linne´ ... Systema vegetabilium :secundum classes, ordines, genera, species. Cum characteribus, differentiis et synonymiis. 6. Stuttgardtiae: Sumtibus J.G. Cottae, 1820.
  Rondeau, R., K. Decker, J. Handwerk, J. Siemers, L. Grunau, and C. Pague. 2011. The state of Colorado's biodiversity 2011. Prepared for The Nature Conservancy. Fort Collins, Colorado: Colorado Natural Heritage Program, Colorado State University. {TAS-pdf}
  Roskov Y., Abucay L., Orrell T., Nicolson D., Bailly N., Kirk P.M., Bourgoin T., DeWalt R.E., Decock W., De Wever A., Nieukerken E. van, Zarucchi J., Penev L., eds. 2018. 2018 Annual Checklist. Species 2000 & ITIS Catalogue of Life. Leiden, the Netherlands: Naturalis. Link to external document. ISSN 2405-884X
  Roth, Alberto Guilielmo. 1798. II. Novae Plantarum Species. Archiv fur die Botanik. 1: 37-52. Link to external document.
  Roth, Albrecht Wilhelm. 1788-1800. Tentamen florae Germanicae; continens enumerationem plantarum in Germania sponte nascentium. Lipsiae [Leipzig]: In Bibliopolio I.G. Mlleriano, 1788-1800. Link to external document.
  Rusby, Henry H. 1896. An Enumeration of the Plants Collected in Bolivia by Miguel Bang. Memoirs of the Torrey Botanical Club. 6(1):1-130. Link to external document.
  Rydberg, Per Axel. 1896. Flora of the Black Hills of South Dakota. Contributions from the U. S. National Herbarium. 3(8):463-537. Link to external document.
  Rydberg, Per Axel. 1900a. Catalogue of the Flora of Montana and Yellowstone National Park. Memoirs of the New York Botanical Garden. 1. Link to external document. Preface dated February 15, 1900.
  Rydberg, Per Axel. 1900b. Studies on the Rocky Mountain Flora. — I. Bulletin of Torrey Botanical Club. 27(4):169-189. Link to external document.
  Rydberg, Per Axel. 1901a. Studies on the Rocky Mountain Flora.—IV. Bulletin of the Torrey Botanical Club. 28(1):20-28. Link to external document.
  Rydberg, Per Axel. 1901. Studies on the Rocky Mountain Flora.—V. Bulletin of the Torrey Botanical Club. 28: 266-284. https://www.biodiversitylibrary.org/item/8006
  Rydberg, Per Axel. 1905. Studies on the Rocky Mountain flora — XIV. Bulletin of the Torey Botanical Club. 32(3):123-138.
  Rydberg, Per Axel. 1906. Flora of Colorado. Bulletin 100. Fort Collins, Colorado: Experiment Station, Colorado Agricultural College, 1906. Link to external document. Date retrieved: 30 September 2016. DOI: http://dx.doi.org/10.5962/bhl.title.2486
  Rydberg, Per Axel. 1909b. Studies on the Rocky Mountain flora — XIX. Bulletin of the Torrey Botanical Club. 36(9):531-542. Link to external document.
  Rydberg, Per Axel. 1910. Studies on the Rocky Mountain flora -- XXII. Bulletin of the Torrey Botanical Club. 37(6):313-335.
  Rydberg, Per Axel. 1910b. Studies on the Rocky Mountain flora — XXIII. Bulletin of the Torrey Botanical Club. 37(9):443-473. Link to external document.
  Rydberg, Per Axel. 1912. Studies on the Rocky Mountain Flora — XXVI. Bulletin of the Torrey Botanical Club. 39(3):99-112. Link to external document.
  Rydberg, Per Axel. 1913. Studies on the Rocky Mountain flora—XXVIII. Bulletin of the Torrey Botanical Club. 40(2):43-74. https://www.biodiversitylibrary.org/item/55388
  Rydberg, Per Axel. 1915. North American Flora. 34(2):87. New York: New York Botanical Garden, 1915.
  Rydberg, Per Axel. 1917. Flora of the Rocky Mountains and Adjacent Plains. New York: Published by the Author, 1917. Link to external document. Retrieved 5 February 2016,Biodiversity Heritage Library, http://dx.doi.org/10.5962/bhl.title.7757
  Rydberg, Per Axel. 1922. Flora of the Rocky Mountains and Adjacent Plains. 2nd edition. New York: 1922.
  Rydberg, Per Axel. 1895. New Species of Physalis. Bulletin of the Torrey Botanical Club. 22: 306-. Link to external document.
  Rydberg, Per Axel. 1904. Studies on the Rocky Mountain flora -- XI. Bulletin of the Torrey Botanical Club. 31(7):399-410. Link to external document.
  Salesman, Jessica Bolwahn, and Meredith Thomsen. 2011. Smooth Brome (Bromus inermis) in Tallgrass Prairies: A Review of Control Methods and Future Research Directions. Ecological Restoration. 29(4):374-381.
  Sanchez, Daiel, Balbina Vazquez-Benitez, Monserrat Vaquez-Sanchez, David Aquino, Salvador Aria. 2022. Phylogenetic relationships in Coryphantha and implications on pelecyphora and Escobaria (Cacteae, Cactoideae, Cactaceae). PhytoKeys. 188: 115-165. Link to external document. https://doi.org/10.3897/phytokeys.188.75739
  Sargent, Charles Sprague. 1897. Notes of Cultivated Conifers. -- IV. Garden and Forest: A Journal of Horticulture, Landscape Art, and Forestry. 10(505):420. New York: The Garden and Forest Publishing CO., October 27, 1897. Date retrieved: 17 December 2020, https://www.biodiversitylibrary.org/page/34643249#page/435/
  Savard, Jean-Pierre L., Philippe Clergeau, and Gwenaelle Mennechez. 2000. Biodiversity concepts and erban ecosystems. Landscape and Urban Planning. 49: 131-142. {TAS-pdf}
  Schaffner, John H. 1920. The Diecious Nature of Buffalo-Grass. Bulletin of the Torrey Botanical Club. 47(3):119-124. {TAS-pdf}
  Schalau, Jeff, and Gene Rwaronite. 2010. Wildfile Risk Reduction in Arizona's Interior Chaparral. Arizona Cooperative Extension, AZ1516. Link to external document. {TAS-pdf}
  Scheele, Adolf. 1848. Beitrage aur Flor von Texas. Linnaea: Ein Journal fur die Botanik in ihrem ganzen Umfange. 21(6):747. Link to external document.
  Scheuzer, Johann Jacob. 1719. Agrostographia, sive, Graminum, juncorum, cyperorum, cyperoidum, iisque affinium historia. Tiguri: Apud Orell, Gessner, Fuessli.
  Schilling, Edward E., Jose L. Panero, Bonnie S. Crozier, Randall W. Scott, and Patricia Davila. 2015. Bricklebush (Brickellia) phylogeny reveals dimensions of the great Asteraceae radiation in Mexico. Molecular Phylogenetics and Evolution. 85: 161-170.
  Schilling, Edward, Randall W. Scott, and Jose L. Panero. 2015. A revised infrageneric classification for Brickellia (Asteraceae, Eupatorieae). Phytotaxa. 234(2). Link to external document.
  Schneider, Adam C. 2016. Resurrection of the genus Aphyllon for the New World broomrapes (Orobanche s.l., Orobanchaceae). Phytokeys. 75: 107-118. Date retrieved 20 October 2020, https://www.researchgate.net/publication/311550883_Resurrection_of_the_genus_Aphyllon_for_New_World_broomrapes_Orobanche_sl_Orobanchaceae/fulltext/5a20ae9e4585158865c50b3b/Resurrection-of-the-genus-Aphyllon-for-New-World-broomrapes-Orobanche-sl-Orobanchaceae.pdf
  Schrader, Heinrich Adolph. 1809. Uber Passas's Halophyta, mit besondrer Rucksicht auf die Gattungen Salsola und Svaeda ; von dem Herausgeber. *). Neues Journal fu¨r die Botanik. 3.Bd(3):85. Link to external document. *) In der konigl. Societat der Wissenschaften zu Gottingen den 21. Jan. 1809 vorgelesen.
  Schreber, Johann Christian Daniel von. 1771. Spicilegium Florae Lipsicae. Lipsiae [Leipzig].
  Schreber, Johann Christian Daniel van. 1791. Genera Plantarum Eorumque Characteres Naturales Secundum Numerum, Figuram, Situm, & Proportionem Omnium Fructificationis Partium. (Ed. 8[a]). Link to external document. Pp. i-xxxi, 1-379, Apr 1789, pp. 1-8, 381-872, May 1791.This volume counts as edition 8[a] of Linnaeus's Genera Plantarum.
  Schultes, Josef A. 1822. Mantissa in Volumen Primum Systematis Vegetabilium Caroli A Linne.
  Schulz, Leila M. 2006. Artemisia. Flora of North America. 19, 20, 21: 503. Link to external document. Date retrieved: 18 January 2021.
  Schweinitz, Lewis D. de. 1824. § 2 Botany: A Catalogue of plants collected in the North Western territory by Mr. Thomas Say, in the year, 1823. pp. 379-400 in Keating, H. W.. Narrative of an expedition to the source of St. Peter's River, Lake Winnepeek, Lake of the Woods, &c. &c. : performed in the year 1823, by the order of the Hon. J. C. Calhoun, Secretary of War, under the command of Stephen H. Long, Major, U.S.T.E. V.02. 1824. Link to external document.
  Scopoli, Giovanni Antonio. 1772. Flora Carniolica : exhibens plantas Carnioliae indigenas et distributas in classes, genera, species, varietates, ordine Linnaeano. [Carniolian flora : exhibiting native Carniol plants and distributed into classes, genera, species, varieties, in the Linnaean order]. 1-2. Vienna: Impensis Ioannis Pauli Krauss. Link to external document. Carniola is the former Austrian crownland, N. Yugoslavia.
  Scott, G. R. 1972. Geologic map of the Morrison quadrangle, Jefferson County, Colorado. Miscellaneous Geologic Investigations Map I-790-A. U. S. Geological Survey: 1972. {TAS-pdf} http://ngmdb.usgs.gov/ngm-bin/pdp/download.pl?q=7283_9620_5, accessed 28 August 2014
  SEINet. 2019+. Regional Networks of North American Herbaria. Date retrieved: daily, if not more often, http://swbiodiversity.org/seinet/index.php
  Semple, J. C. 2018. Classification and Illustrations of Goldenrods. Link to external document.
  Sencer, H. A., and J. G. Hawkes. 1980. On the origin of cultivated rye. Biological Journal of the Linnean Society. 13(4):299-313.
  Shang, Hai-Ying, Yu-Ming Wei, Xiao-Rong Wang, and You-Liang Zheng. 2006. Senetic diversity and phylogenetic relationships in the rye genus Secale L. (rye) based on Secale cereale microsatellite markers. Genetics and Molecular Biology. 29(4). Date retrieved: 6 December 2020, https://www.scielo.br/scielo.php?pid=S1415-47572006000400018&script=sci_arttext
  Shaw, Robert B. 2008. Grasses of Colorado. Boulder, Colorado: University Press of Colorado, 2008. {TAS}
  Sheviak, Charles J. 1984. Spiranthes diluvialis (Orchidaceae), a New Species from the Western United States. Brittonia. 36(1). {TAS-pdf} https://www.jstor.org/stable/2806283
  Shinners, Lloyd Herbert. 1951. [unknown title]. Field & Laboratory; Contributions from the Science Departments. 19(71). Publication of name Heterotheca villosa
  Shinners, Lloyd H. 1954. Notes on North Texas Grasses. Rhodora. 56(662):25-38. Link to external document.
  Shinners, Lloyd H. 1955. Non-validity of Nuttallian names in Fraser's Catalogue. Rhodora. 57: 290-293.
  Shinners, Lloyd H. 1957. Synopsis of the Genus Eustoma (Gentianaceae). The Douthwestern Naturalist. 2(1):38-43. {TAS-pdf}
  Simpson, Captain J. H. 1876. Explorations across the Great Basin of the Territory of Nevada for a Direct Wagon-Route from Camp Floyd to Genoa, in Carson Valley in 1859. Washington: Government Printing Office, 1876. Link to external document. Date retrieved: 17 April 2021.
  Sims, John, M.D. 1814. Oenothera ceaspitosa. Curtis's Botanical Magazine. 39(1593). Link to external document.
  Sims, John, M.D. 1821. Helianthus Diffusa. Curtis's Botanical Magazine. 45: 2020. Link to external document.
  Sitgreaves, L. 1853. Report of an expediition down the Zuni and Colorado Rivers. Washington, D.C.: Robert Armstrong, Public Printer, 1853. https://www.biodiversitylibrary.org/item/124223
  Sivicek, Valeria, and John Taft. 2011. Functional Group Density as an index for assessing habitat quality in tallgrass prairie. Ecological Indicators. 11: 1251-1258. Link to external document. {TAS-pdf} doi: 10.1016/j.ecolind.2011.01.003
  Small, Ernest. 1978. A numerical and nomenclatural analysis of morpho-geographic taxa of Humulus. Syst. Bot. 3: 37-76. {TAS}
  Small Ernest. 1980. The relationships of hop cultivars and wild variants of Humulus lupulus. Canadian Journal of Botany. 58: 676-686. {TAS}
  Small, Ernest. 1993+. Humulus. pp. in Flora of North America Editorial Committee. Flora of North America North of Mexico [Online]. 3. Link to external document. Date retireved: September 2021 [multiple dates]
  Small, Jared G. 1899. A synopsis of the Genus Sitanion. Studies on American Grasses. Bulletin. United States. Department of Agriculture. Division of Agrostology.. 18. Link to external document.
  Small, John Kunkel, and Per Axel Rydberg. 1903. Flora of the southeastern United States. New York: The author, 1903. Link to external document.
  Small, John Kunkel, and Per Axel Rydberg. 1913. Flora of the southeastern United States; being descriptions of the seed-plants, ferns and fern-allies growing naturally in North Carolina, South Carolina, Georgia, Florida, Tennessee, Alabama, Mississ…. New York: The author, 1913. Link to external document.
  Smith, James P. 2012. Elymus smithii. pp. in Jepson Flora Project. Jepson eFlora. Link to external document. Date retrieved: 31 March 2021.
  Snow, Neil. 2009. Checklist of Vascular Plants of the Southern Rocky Mountain Region (Version 3). 316 p. {TAS-pdf} (http://www.conps.org/pdf/Plant%20Keys/SRMRChecklist_Version3_2009_Final_SmallerSize.pdf, accessed 10 November 2014.)
  Sobolewski, Gregor. 1799. Flora Petropolitana. Sistens plantas in Gubernio Petropolitano sponte crescentes, tam eas quae olim in Flora Ingrica Krascheninnikovii a Gortero enumeratae sunt, quam novas post annum 1764 hucuque a variis botanicis Petropoli degentibus detecta …. Petropoli: Typis Collegii Imperialis Medici, 1799. Link to external document. "Petropoli" = Leningrad
  Soreng, Robert J., Edward E. Terrell, John Wiersma, & S. J. Darbyshore. 2001. (1488) Proposal to conserve the name Schedonorus arundinaceus (Schreb.) Dumort. Against Schedonorus arundinaceus Roem. & Shult. (Poaceae: Poaeae). Taxon. 50: 915-917. {TAS-pdf}
  Sovell, John, Pam Smith, Denise Culver, Susan Panjabi and Joe Stevens. 2012. Survey of Critical Biological Resources, Jefferson County, Colorado, 2010-2011. Prepared for: Jefferson County Board of County Commissioners. Fort Collins, Colorado: Colorado Natural Heritage Program, Warner College of Natural Resources, Colorado State University, 2012. {TAS-pdf}
  Spitzzeri, Paul R. 1998. "To Seduce and Confuse:" The Rowland-Workman Expedition of 1841. Southern California Quarterly. 80(1):31-46. Link to external document.
  Sprengel, Curt Polycarp Joachim. 1826. Systema vegetabilium [Caroli Linnaei ... ]. Editio decima sexta. Gottingae.
  Spring, Otmas, and Edward E. Schilling. 1990. The Origin of Helianthus × multiflorus and H. × laetiflorus (Asteraceae). Biochemical Systematics and Ecology. 18(1):19-23. Link to external document.
  Spurlock, Clay. 1940. Monoecious and Dioecious Grasses of the Americas. M. S. Thesis. Goodwell, Oklahoma: Panhandle Agricultural and Mechanical College, 1940. {TAS-pdf}
  Sramko, Gabor, Leventa Laczko, Polina A. Volkova, Richard M. Bateman, and Jelena Mlinarec. 2019. Evolutionary history of the Pasque-flowers (Pulsatilla, Ranunculaceae): molecular phylogenetics, systematics and rDNA evolution. Molecular Phylogenetics and Evolution. Link to external document.
  Steadman, Christy. 2019. Golden Giddyup withdraws Kinney Run singletrack sidewalk proposal. Colorado Community Meda. {TAS-pdf} Date retrieved: 12 February 2019, http://coloradocommunitymedia.com/stories/golden-giddyup-withdraws-kinney-run-singletrack-sidewalk-proposal,275553?
  Stearn, William T. 2004. Botanical Latin. 4th edition. Portland, Oregon: Timber Press, 2004.
  Stettler, R. F., H. D. Bradshaw, Jr., P. E. Heilman, and T. M. Hinckley, editors. 1996. Biology of Populus and its Implications for Management and Conservation. Ottawa: NRC Research Press, 1996. Link to external document.
  Steudel, Ernst Gottlieb. 1855. Synopsis plantarum glumacearum. Stuttgartiae: J.B. Metzler, 1855. In two volumes, date retrieved 10 July 2020, https://www.biodiversitylibrary.org/item/9723, https://www.biodiversitylibrary.org/item/9724
  Stevens, I. I. 1855. Report of Explorations for a Route for the Pacific Railroad near the Forty-Seventh and Forty-Nonth Parallels of North Latitide from St. Paul to Puget Sound. Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean. 1. Link to external document.
  Stevens, P. F. 2001 onwards. Angiosperm Phylogeny Website. Version 14, July 2017 [and more or less continuously updated since]. Link to external document.
  Sullivant, Wm. S. 1842. An account of three undescribed Plants of Central Ohio. American Journal of Science and Arts. 42(1):49-50. Link to external document.
  Sun, Feng-Jie, and Stephen R. Downie. 2010. Phylogenetic relationships among the perennial, endemic Apiaceae subfamily Apioideae of western North America: additional data from the cpDNA trnF-trnL-trnT region continue to support a highly polyphyletic Cymopterus. Plant Diversity and Evolution. 128(1-2):151-172. Date retrieved: 20 April 2021, available through ResearchGate.
  Sutton, D. A. 1988. A revision of the tribe Antirrhineae. Oxford, UK: Oxford University Press.
  Sweet, Robert. 1826. Sweet's Hortus Britannicus: or a catalogue of plants cultivated in the gardens of Great Britain, arranged in natural orders …. Link to external document.
  Sweet, Robert. 1830, 2nd ed.. Sweet's Hortus britannicus;. or, A catalogue of plants, indigenous, or cultivated in the gardens of Great Britain; arranged according to their natural orders, with references to the Linnean class and order to which each genus belongs; the whole brought up to the present time …. London: James Ridgway, 1830. Link to external document. Date retrieved: 27 February 2021.
  Swezey, Goodwin D. 1891. Nebraska Flowering Plants. Doane College, Natural History Studies No. 1. Crete, Nebraska. Link to external document.
  Tabermaemontanus, Jacobus Theodorus. 1590. Eicones plantarum seu stirpium, arborum nempe, fructicum, herbarum, fructuum, lignorum, radicum, omnis generi. [Icons of plants or plants, trees, fruits, herbs, fruits, trees, roots, of all kinds, both inmates and foreign arranged into three parts: with the addition of the richest double index]. Francofurti ad Moenum: Published anonymously., 1590. Link to external document. This is a reissue of the illustrations in I. Theodorus' Neuw Kreuterbuch.
  Tembrock, L. R., J. M. McAteer, & T. M. Gilligan. 2016. A revision of native North American Humulus (Cannabaceae). J. Bot. Res. Inst. Texas.
  The Plant List. 2013. Version 1.1.
  Thunberg, Carl Peter. 1794-1800. Prodromus plantarum Capensium :quas in promontorio Bonæ Spei Africes, annis 1772-1775. [An Introduction to the Capean Plants of Africa on the Cape of Good Hope, for the years 1772-1775]. Upsaliae: J. Edman, 1794, 1800. Link to external document.
  Tidestrom, Ivar. 1925. Flora of Utah and Nevada. Contributions from the United States National Herbarium. 25. Washington, DC: Government Printing Office, 1925.
  Tidestrom, Ivar, and Sister Teresita Kittel. 1941. A Flora of Arizona and New Mexico. Washington, DC: The Catholic University of America Press, 1941. {TAS}
  Torok, P., et al. 2021. Invasion of the North American sand dropseed (Sporobolus cryptandrus) -- A new pest in Eurasian sand areas?. Global Ecology and Conservation. 32. https://doi.org/10.1016/j.gecco.2021.e01942
  Torrey, John. 1819. A catalogue of plants, growing spontaneously within thirty miles of the City of New-York. Albany: Published by the Lyceum of Natural History of New York, 1819. Link to external document.
  Torrey, John. 1824a. Description of some new or rare plants from the Rocky Mountains, collected in July, 1820, by Dr. E. James. Annals of the Lyceum of Natural History of New York. 1: 30-36. {TAS-pdf}
  Torrey, John. 1824b. Description of some new grasses, collected by Dr. E. James, during the expedition of Major Long to the Rocky Mountains, in 1819-1820. Annals of the Lyceum of Natural History of New York. 1: 148-156. {TAS-pdf}
  Torrey, John. 1824. A flora of the northern and middle sections of the United States; or, A systematic arrangement and description of all the plants hitherto discovered in the United States north of Virginia Vol. 1. New York: T. and J. Swords, 1824. Link to external document.
  Torrey, John. 1857. Report of the Botany of the Expedition. Esplorations and Surveys for a Railroad Route from the Mississippi River to the Padific Ocean. Route near the Thirty-Fifith Parallel, Explored by Lieutenant A. W. Whipple, Topographical Engineers, in 1853 and 1854.. Link to external document.
  Torrey, John G. 1828. Some account of a Collection of Plants made during a journey to and from the Rocky Mountains in the summer of 1820, by Edwin P. James, M. D. Assistant Surgeon U. S. Army. Read December 11, 1826.. Annals of the Lyceum of Natural History of New York. 2: 241. Link to external document. {TAS-pdf} Also: https://www.biodiversitylibrary.org/item/54039. Read December 11, 1826. “In the eaxmination of the specimens, I have been greatly assisted by my learned friend Thomas Nuttall, Esq. who has devoted more attention to the botany of this country than any other individual. This gentleman has not yet published the plants collected by him during his journey into the Arkansa country in 1819, though it is his intention to have his account of them succeed this in a short time.”
  Torrey, John, and Asa Gray. 1838-1843. A flora of North America :containing abridged descriptions of all the known indigenous and naturalized plants growing north of Mexico, arranged according to the natural system. 1-2. Link to external document.
  Torrey, John, and Asa Gray. 1841. Flora of North America. 2.
  Torrey, John, and Asa Gray. 1855. Botanical Report upon the Collections made by Captain Gunnison, Topographical Engineers, in 1853 and by Lieutenant E. G. Beckwith, Third Artillery, in 1854. Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean. 2. Link to external document.
  Torrey, John, and Asa Gray. 1857a. Botanical Report. Explorations and Surveys for a Railroad Route from the Mississippi River to the Pacific Ocean. Route near the Thirty-Fifth Parallel, Explored by Lieutenant A. W. Whipple, Topographical Engineers, in 1853 and 1854.. 2: 1-158. Link to external document. Generally known as the “Pacific Railway Reports.”
  Torrey, John, and Asa Gray. 1857b. Botanical Report. Explorations and Surveys for a Railroad Route from the Mississippi River to the Pacific Ocean. Route near the Thirty-Fifth Parallel, Explored by Lieutenant A. W. Whipple, Topographical Engineers, in 1853 and 1854.. 2: 159-178. Link to external document. Generally known as the “Pacific Railway Reports.”
  Torrey John. 1859. Part I. Botany of the Boundary. pp. Volume II in Emory, William H.. Report on the United States and Mexican Boundary Survey. Washington: 1859. Link to external document. Some sections written by others, e.g., Euphorbiaceae written by George Engelmann, M.D.
  Trinius, C. B. 1836. Graminum in hisce a se editorum generibus ac specibus supplementa addit. Mémoires de l'Académie impériale des sciences de St.-Pétersbourg. 6e série. Sixieme serie. t. 4(pt. 2):2-108. St. Petersbourg: Mars 1838. Link to external document. (Conventui exhib. die 11 Decembris 1835.)
  Trinius, C. B. 1840. Genera Graminum — V. Agrostidea. Mémoires de l'Académie impériale des sciences de St.-Pétersbourg. 6e Serie(pt. 2):23-134. Link to external document. Date retrieved: 29 March 2021.
  Trinius, Carl Bernhard, and F. J. Ruprecht. 1842. Species Graminum Stipaceorum. Petropoli: Typis Academiae Imperialis Scientiarum, 1842. Link to external document. Date retrieved: 26 March 2021.
  Trock, Debra. 2006. Packera. Flora of North America. 20. Link to external document. Date retrieved: 2014-2021.
  Turland, N. J., et al. 2018. International Code of Nomenclature for algae, fungi, and plants (Shenzhen Code) adopted by the Nineteenth International Botanical Congress Shenzhen, China, July 2017. Regnum Vegetabile 159.. Glashütten: Koeltz Botanical Books.. Link to external document.
  Turner, Billie L. 1956. A Cytotaxonomic Study of the Genus Hymenopappus (Compositae). Rhodora: Journal of the New England Botanical Club. 58(691-4):163ff,208ff,250ff,295ff. Link to external document.
  Turner, Billie L. 1995. Synopsis of the genus Onosmodium (Boraginaceae). Phytologia. 78(1):39-60. Link to external document.
  University of Colorado, College of Liberal Arts, Junior Class. 1909. The Coloradoan. 11.
  Uotila, Pertti, et al. 2021. Phylogeny, biogeography and systematics of Dysphanieae (Amaranthaceae). Systematics and Phylogeny. Taxon. 70(3):526-551. https://doi.org/10.1002/tax.12458
  U.S. Board on Geographic Names. n.d.. United States on Geographic Names. Date retrieved: 11 February 2019. https://geonames.usgs.gov/
  USDA, NRCS. 2014. The Plants Database. Greensboro, NC 27401-4901: National Plant Data Team. (http://plants.usda.gov, accessed many dates in 2014)
  USDA Natural Resources Conservation Service. 2021. The PLANTS Database. Greensboro, NC: National Plant Data Team. Link to external document. Dates retrieved: 12 May 2021 and many following.
  United States National Vegetation Classification. 2019. United States National Vegetation Classification Database. V2.03. Washington DC: Federal Geographic Data Committee, Vegetation Subcommittee, 2019.
  Vaillant, Sebastien. 1827 (post.). Botanicon Parisiense, ou Denombrement par ordre alphabetique des plantes. Amsterdam: ean & Herman Verbeek, 1727. Link to external document.
  Van Horn, Richard. 1957. Bedrock geology of the Golden quadrangle, Colorado. Geologic Quadrangle Map GQ-103. 1957. {TAS-pdf} Geotiff available at: http://ngmdb.usgs.gov/ngm-bin/pdp/download.pl?q=15570_548_5, accessed 26 August 2014.
  Van Horn, Richard. 1972. Surficial and bedrock geologic map of the Golden Quadrangle, Jefferson County, Colorado. USGS IMAP: 761-A. 1972. {TAS-pdf} http://ngmdb.usgs.gov/ngm-bin/pdp/download.pl?q=7281_9511_5, accessed 27 August 2014
  Van Horn, Richard. 1976. Geology of the Golden Quadrangle, Colorado. USGS Professional Paper: 872. 1976. {TAS-pdf} http://pubs.usgs.gov/pp/0872/report.pdf, accessed 27 August 2014.
  Van Royen, Adrianus. 1740. Florae leydensis prodromus :exhibens plantas quae in Horto academico Lugduno-Batavo aluntur. Lugduni Batavorum [Leiden]: Apud Samuelen Luchtmans academiae typographum, 1740. Link to external document.
  Varnell, Jeanne. 1972. South Table Mountain: Brimming with tales of history. Jefferson Sentinel. {TAS-pdf}
  Vasey, George. 1884. New Grasses. Bulletin of the Torrey Botanical Club. XI(1):125-126. Link to external document. Date retrieved: 22 March 2021.
  Vasey, George R. 1883. Descriptions of new or noteworthy grasses from the United States. Contributions from the U. S. National Herbarium. 1: 267-280. Link to external document. Date retrieved: 31 March 2021.
  Vasey, George R. 1888. New or Rare Grasses. Bulletin of the Torrey Botanical Club. 15(1):48-49. Link to external document. Date retrieved 3 April 2021.
  Vasey, George R. 1893a. Grasses of the Southwest :plates and descriptions of the grasses of the desert region of western Texas, New Mexico, Arizona, and southern California. U. S. Dept. of Agriculture. Division of Botany. Bulletin. 12. Washington, DC: Government Printing Office, 1893. Link to external document.
  Vasey, George R. 1893b. Illustrations of North American grasses. Washington, DC: Government Printing Office, 1893. Link to external document. Originally published as Bulletins 12 and 13 of the Division of Botany.
  Ventenat, Etienne P., Jacques M. Cels, and Henri J. Redoute. 1801. Description des plantes nouvelles et peu connues : cultive´es dans le jardin de J.M. Cels : avec figures. Paris: De l'imprimerie de Crapelet, Jun-Jul 1801. Link to external document.
  Vitman, Fulgenzio Antonio Maris. 1789-1792. Summa plantarum: quae hactenus innotuerunt methodo Linnaeana per genera et species digesta illustrata descripta. 1-6. Link to external document. Date retrieved: 23 March 2021
  Wagner, Warren L. 1983. New Species and Combinations in the Genus Oenothera (Onagraceae). Annals of the Missouri Botanical Garden. 70: 194-196. Link to external document.
  Wagner, Warren L., Peter C. Hoch, and Peter H. Raven. 2007. Revised Classification of the Onagraceae. Systematic Botany Monographs. 83. {TAS-pdf} https://www.jstor.org/stable/i25027967
  Wagner, Warren L., Robert E. Stockhouse, and William M. Klein. 1985. The Systematics and Evolution of the Oenothera caespitosa Species Complex (Onagraceae). Monographs in Systematic Botany. 12. Link to external document.
  Wahlert, Gregory A., Thomas Marcussen, Juliana de Paula-Souza, Min Feng, and Harvey E. Ballard, Jr. 2014. A Phylogeny of Violaceae (Malphigiales) Inferred from Plastid DNA Sequences: Implications for Genetic Diversity and Intrafamilial Classification. Systematic Botany. 39(1).
  Wallroth, Karl Friedrich Wilhelm. 1824. Ad Hoppeum, virum in re herbaria peritissimum, de Malvis germanicis epistola Frederici Wallrothii. [To Hoppeus, a man most skilful in herbaria, the letter of Frederick Wallroth from the German Mallows.]. pp. 138-153 in Hornschuch, Christian Friedrich. Sylloge Plantarum Novarum Itemque Minus Cognitarum a Praestantissimis Botanicis adhuc Viventibus Collecta et a Societate Regia Botanica Ratisbonensi Edita. Ratisbonae. [Sylloge of New Plants and Less Cognitive Plants Collected by Most Excellent Botany While Still Living, and Edited by the Royal Botanica Society of Regensburg]. Regensberg: Typis viduae C.E. Brenck, 1824-1828. Link to external document.
  Walpers, Wilhelm Gerhard. 1842-1847. Repertorium botanices systematicae. Lipsiae: Sumtibus Friderici Hofmeister, 1842-1848. Link to external document.
  Walter, Thomas. 1788. Flora Caroliniana. London: 1788. Full title: Flora Caroliniana, secundum Systema vegetabilium Linnæi digesta, characteres essentiales naturalesve et differentias veras exhibens; cum emendationibus numerosis, descriptionum antea evulgatarum adumbrationes stirpium plus mille continens, necnon generibus novis non paucis, speciebus plurimis novisq. ornata.
  Warnock, M. J. 1981. Biosystematics of the Delphinium carolinum complex. Systematic Botany. 6: 38-54.
  Warnock, M. J. 1995. A taxonomic conspectus of North American Delphinium. Phytologia. 78(2):73-101. Date retrieved: 6 October 2020, https://www.biodiversitylibrary.org/item/47154#page/3/mode/1up
  Waterfall, Umaldy T. 1950. Some Results of a Third Summer's Botanizing in Oklahoma. Rhodora. 52(619):165-. Link to external document.
  Watson, Sereno. 1871. Volume 5, Botany. pp. in King, Clarence. Report of the Geological Exploration of the Fortieth Parallel. Professional Papers of the Engineer Department, U. S. Army. 18. Washington: Government Printing Office, 1871. Link to external document.
  Watson, Sereno. 1873. Revision of the extra-tropical North American Species of the Genus Potentilla (excluding Sibbaldia, Horkelia, and Ivesia). Proceedings of the American Academy of Arts and Sciences. 8. Link to external document.
  Watson, Sereno. 1875. Revision of the Genus Ceanothus and Descriptions of New Plants. Proceedings of the American Academy of Arts and Sciences. new ser.. 2: 333-350. Link to external document.
  Watson, Sereno. 1876. Botanical Contributions. 3. Descriptions of New Species of Plants, chiefly Californian, with Revision of certain Genera. Proceedings of the American Academy of Arts and Sciences. new series. 11: 121-148. Link to external document.
  Watson, Sereno. 1877. Descriptions of New Species of Plants, with Revisions of Centain Genera. Proceedings of the American Academy of Arts and Science. New Series. IV: 273-274. Link to external document.
  Watson, Sereno. 1878. Bibliographical index to North American botany;. or, Citations of authorities for all the recorded indigenous and naturalized species of the flora of North America, with a chronological arrangement of the synonymy. Part I. Polypetalae. 1. Washington: Smithsonian Institution, 1878. Link to external document. Date retrieved: 28 February 2021
  Watson, Sereno. 1879. 1. Revision of the North American Liliaceae. XV. Contributions to American Botany.. Proceedings of the American Academy of Arts and Sciences. n. series, 6: 213-288. Date retrieved: 22 October 2020, https://www.biodiversitylibrary.org/item/35392
  Watson, Sereno. 1888. Some New Species of Plants of the United States, with revisions of Lesquerella (Vesicaria) and of the North American species of Draba. Proceedings of the American Academy of Arts and Sciences. 23, new v 15: 249-287. Link to external document.
  Weakley, Alan S., Richard J. LeBlond, Bruce A. Sorrie, C. Theo Witsell, L. Dwayne Estes, Janchi Gandhi, Katherine Gould Mathews, and Atsushi Ebihara. 2011. New combinations, rank changes, and nonemclatural and taxonomic comments in the vascular flora of the southeastern United States. Journal of the Botanical Research Institute of Texas. 5(2):437-455. {TAS-pdf}
  Weaver, J. E. 1942. Competition of Western Wheat Grass with Relict Vegetation of Prairie. American Journal of Botany. 29(5):366-372. Link to external document. {TAS-pdf}
  Weber, William A. 1982. New Names and Combinations, Principally in the Rocky Mountain Flora -- II. Phytologia. 51: 369-376.
  Weber, William A. 1983. New Names and Combinations, Principally in the Rocky Mountain Flora -- III. Phytologia. 53(3):187-190.
  Weber, William A. 1989. New Names and Combinations, Principally in the Rocky Mountain Flora — VII. Phytologia. 67(6):425-429.
  Weber, William A., and Ronald Hartman. 1979. Pseudostellaria jamesiana, comb. nov., a North American representative of a Eurasian genus. Phytologia. 44(4):313-314. Link to external document.
  Weber, W.A., B.C. Johnston, and R. Whittmann. 1981. Additions to the Flora of Colorado — VII. Brittonia. 33: 325-331.
  Weber, W. A., and Áskell Löve. 1981. New combinations in the genus Packera (Asteraceae). Phytologia. 49(1):44-40. {TAS-pdf}
  Weber, William A., and Ronald C. Wittmann. 2012. Colorado Flora: Eastern Slope. 4th Edition. Boulder, Colorado: University Press of Colorado, 2012. {TAS}
  Weigend, M., M. Gottschlinf, F. Selvi, and H. H. Hilger. 2009. Marbleseeds are gromwells--systematics and evolution of Lithospermum and allies (Boraginaceae tribe Lithospermeae) based on molecular and morphological data. Mol Phylogenetic Evolution. 52(3):755-68. {TAS}
  Weimer, Bob. 2001. Mines Geology Trail. CSM Geology Museum Special Publication No. 1. Golden, Colorado: Colorado School of Mines, Geology Museum, 2001. {TAS-pdf} (http://inside.mines.edu/UserFiles/File/Geology/geoTrail1.pdf, accessed 4 Nov 2014.)
  Welsh, Stanley L. 1978. Utah Flora: Fabaceae (Leguminosae). Great Basin Naturalist. 38(3):225-. Link to external document.
  Welsh, Stanley L. 1991. Oxytropis DC. — Names basionyms, types, and synonyms — Flora North America project. Great Basin Naturalist. 51(4):377-396. Link to external document.
  Welsh, Stanley L., N. Duane Atwood, Sherel Goodrich, and Larry C. Higgins. 1993. A Utah Flora. Second Edition, revised. Provo, Utah: Brigham Young University, 1993. {TAS}
  Wheeler, George M. 1878. Report upon United States Geographical surveys west of the one hundredth meridian. 6 vols.. Washington, D.C.: Government Printing Office, 1875-1889. https://www.biodiversitylibrary.org/bibliography/49058
  White, Sally, and Loraine Yeatts. 1994. Plants of North Table Mountain 1. {TAS-pdf} (http://www.conps.org/pdf/Plant_Lists/NTableMtByFam.pdf, accessed 15 August 2014) This list was used for two Colorado Native Plant Society field trips: 14 May 1994, led by Sally White and Loraine Yeatts, and 23 May 1998, led by Paul Kilburn and Jerry Duncan.
  Wichmann, Brenda L. 2023. Synopsis of the Twentieth Annual Colorado Rare Plant Symposium. Aquilegia. 47(4). Link to external document.
  Wiegand, K. M. 1900. Juncus tenuis Willd. and some of its North American Allies. Torrey Botanical Club. 27(10):511-. Link to external document.
  Wikipedia contributors. 2020. Henry H. Spalding. Wikipedia, The Free Encyclopedia. (Retrieved: 2 October 2020, https://en.wikipedia.org/wiki/Henry_H._Spalding
  Wikipedia contributors. 2020a. The Cactaceae. Wikipedia, The Free Encyclopedia. Date retrieved: 15 October 2020, https://en.wikipedia.org/wiki/The_Cactaceae
  Willdenow, Carl L. 1797-1830. Species Plantarum. Editio Quarta. Berlin. Link to external document. Dates: Six volumes: 1(1), Jun 1797, 1(2), Jul 1798, 2(1),¹Mar 1799, 2(2), Dec 1799, 3(1), 1800, 3(2), 1-10 Nov¹1802, 3(3), Apr-Dec 1803, 4(1), 1805, 4(2), Apr¹1806, 5(1), 25-27 Jan 1810, 5(2), 1830, 6(1), 1824, and ¹6(2), 1825.
  Willdenow, Carl Ludwig. 1809. Enumeratio Plantarum Horti Regii Botanici Berolinensis. Part I. Berlin: 1809. (Retrieved: 1 October 2016, http://bibdigital.rjb.csic.es/ing/Libro.php?Libro=1684)
  Willyard, Ann, et al. 2017. Pinus ponderosa: A checkered past obscured four species. American Journal of Botany. 104(1):161-181. {TAS-pdf}
  Wilson, Scott D. 1989. The suppression of native prairie by alien species introduced for revegetation. Landscape and Urban Planning. 17(2):113-119.
  Wilson, Scott D., and Joyce W. Belcher. 1989. Plant and Bord Communities of Native Prairie and Intriduced Eurasion Vegetation in Manitobe, Canada. Conservation Biology. 3(1):39-44.
  Windham, Michael D. 1987. Argyrochosma, a New Genus of Cheilanthoid Ferns. American Fern Journal. The American Fern Society. 77(2):(37-41). Link to external document.
  Wingate, Janet L. 1994. Illustrated Keys to the Grasses of Colorado. Denver, CO: Wingate Consulting, 1994. {TAS}
  Wingate, Janet L. 2017. Sedges of Colorado. Parker, CO: Wingate Consulting, 2017.
  Wingate, Janet L. 2021. Colorado Grasses with Illustrated Keys. Parker, CO: Wingate Consulting, 2021.
  Withering, William. 1796. An arrangement of British plants; according to the latest improvements of the Linnaean system. London: G. G. and J. Robinson, 1796. Link to external document.
  Wooton, E. O., and Paul C. Standley. 1915. Flora of New Mexico. Contributions from the United States National Herbarium. 19. Date retrieved: 16 August 2020, URL: https://www.biodiversitylibrary.org/item/13779
  Yeatts, Dick, and Loraine Yeatts. 2009. Plants of Green Mt. [Jefferson Co(s), Colorado]. Observed on CONPS fieldtrip, 05/25/2009. {TAS-pdf} (http://www.conps.org/pdf/Plant_Lists/GreenMt3ByFam.pdf, Accessed 26 August 2014.)
  Yi, Tingshuang, Allison J. Miller, and Jun Wen. 2004. Phylogenetic and biogeographic diversication of Rhus (Anacardiaceae) in the Northern Hemisphere. Molecular Phylogenetics and Evolution. 33(3):861-879.
  Yi, Tingshuang, Allison J. Miller, and Jun Wen. 2007. Phylogeny of Rhus (Anacardiaceae) Based on Sequences of Nuclear Nia-i3 intron and Chloroplast TrnC-trnD. Systematic Botany. 32(2):379-391. {TAS-PDF}
  Zeise, Larry Steven. 1976. An ecological survey of North Table Mountain near Golden, Colorado. pp. in Supervised and Edited by John W. Marr, Ecologist, Professor of Biology. A study conducted for the Technical Advisory Committee of the Colorado Chapter of the Nature Conservancy. Boulder, Colorado: Laboratory of Mountain Ecology for Man, Department of Environmental Biology, University of Colorado, November, 1976. {TAS-pdf}
  Zhou, Q., Cai, Q., Zheng, Y., Wu, Z., & Mao, J. 2019. Floral development and the formation of functionally unisexual flowers in Xanthoceras sorbifolium (Sapindaceae), a morphologially andromonoecious tree endemic to northern China. Trees. https://doi.org/10.1007/s00468-019-01879-6
  Zomlefer, Wendy B., and Walter S. Judd. 2002. Resurrection of Segregates of the Polyphyletic Genus Zigadenus s.l. (Liliales: Melanthiaceae) and Resulting New Combinations. Novon. 12(2):299-308. Date retrieved: 23 October 2020, https://www.jstor.org/stable/3392971
  Zomlefer, Wendy B., Walter S. Judd, W. Mark Whitten, Norris H. Williams. 2006. A Synopsis of Melanthiaceae (Liliales) with Focus on Character Evolution in the Tribe Melanthiaeae. Aliso: A Journal of Systematic and Evolutionary Botany. 22(1):44. Date retrieved: 22 October 2020, http://scholarship.claremont.edu/aliso/vol22/iss1/44
  [Previous Page] [Next Page]

Go to page: [1] [3] [6] [63] [633] [7] [8] [9]

If you have a question or a comment you may write to me at: tomas@schweich.com I sometimes post interesting questions in my FAQ, but I never disclose your full name or address.  


[Home Page] [Site Map]

Date and time this article was prepared: 11/3/2024 5:24:35 PM