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Detailed Area Plant List for South Illinois Open Space, Jefferson County, United States.
Edited by Tom Schweich
This list is assembled from personal collections, herbarium vouchers, and published lists that were available at the time this list was prepared. There may be additional species of plants in this area that were unknown or undocumented at the time this list was prepared. For California, much of the data is provided by the participants of the Consortium of California Herbaria as indicated by a single dagger “†.” Their web site is at: (http://ucjeps.berkeley.edu/consortium/). For Colorado, much of the data is provided by the Southwest Environmental Information Network as indicated by a double dagger “‡,” which web site is found at (http://swbiodiversity.org). See their respective websites for copyright information and recommended citation formats.
For a complete list of Locations included in this Area List, see the Locations Included section, below. For a check list, please see: Check List for South Illinois Open Space, Jefferson County, United States.
 Coll. No. 1852, Vulpia octoflora |
 Coll. No. 1852, A little annual Vulpia octoflora |
Pinaceae
Pinus edulis Engelm. Pinyon Pine. CalPhotos. Jepson eFlora. SEINet Taxon.
- South Illinois Open Space,
3937.
12/20/2024.
.
 Coll. No. 3547, Pinus edulis. |
 Coll. No. 3547, Pinus edulis. |
 Location of Pinus edulis on Mt. Zion. |
Asteraceae
Artemisia ludoviciana Nutt. Silver Wormwood. CalPhotos. Jepson eFlora. SEINet Taxon.
- South Illinois Open Space,
3936.
12/20/2024.
.
.
Ericameria nauseosa (Pall. ex Pursh) G.L.Nesom & G.I.Baird var. graveolens (Nutt.) Reveal & Schuyler. (Syn: E. n. (Pall. ex Pursh) G.L.Nesom & G.I.Baird var. glabrata (Gray) G.L. Nesom & Baird ) Goldy-Locks. CalPhotos. Jepson eFlora. SEINet Taxon.
- South Illinois Open Space,
3940.
12/20/2024.
.
.
Gutierrezia sarothrae (Pursh) Britton & Rusby. (Syn: G. linearifolia Lag. ) Broom Snakeweed. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial, tap-rooted, to 9 cm.; Leaves, alternate, linear, 20 mm. × 1 mm. mm. wide, dotted with embedded oil glands, very few short hairs; Peduncle, 0.5-1.5 mm.; Inflorescence, some flowers with strap-shaped corollas, flowers of two kinds in same heads, Involucre, 3.5 mm. × 2.5-3.0 mm. wide, obconic, not gummy; Phyllary, 2-3 unequal series, inner folded around ovary of ray flowers, dotted with embedded oil glands, tips appressed; Receptacle, epaleate; Rays, #5, yellow; Disk, #4; Pappus, a well-developed crown of scales on both ray and disk flowers; (Described from Coll. No. 144, 3 Oct 1997: keys easily to Gutierrezia sarothrae. However, inner phyllaries are folded around ovary of ray flowers, a character not mentioned in keys or description.)
- South Illinois Open Space,
3943.
12/20/2024.
.
Cannabaceae
Celtis reticulata Torr. (Syn: Celtis laevigata Willd. var. reticulata L. D. Benson ) Net-Leaved Hackberry. CalPhotos. Jepson eFlora. SEINet Taxon.
- South Illinois Open Space,
3938.
12/20/2024.
.
Fagaceae
Quercus gambelii Nutt. Gambel's oak. CalPhotos. Jepson eFlora. SEINet Taxon.
- South Illinois Open Space,
3935.
12/20/2024.
.
 Coll. No. 2738, Quercus gambelii |
 Coll. No. 2391, Quercus gambelii |
 Coll. No. 2288, Quercus gambelii |
Polygonaceae
Rumex crispus L. Curley Dock. CalPhotos. Jepson eFlora. SEINet Taxon.
- South Illinois Open Space,
3939.
12/20/2024.
.
 Coll. No. 2817, Rumex crispus |
 Coll. No. 818, Rumex crispus |
Rosaceae
Fallugia paradoxa (D. Don) Endl. Apache Plume. CalPhotos. Jepson eFlora. SEINet Taxon.
- South Illinois Open Space,
3944.
12/20/2024.
.
Poaceae
Agropyron cristatum (L.) Gaertn. Crested Wheat Grass. CalPhotos. Jepson eFlora. SEINet Taxon.
- South Illinois Open Space,
3942.
12/20/2024.
.
.
Bromus inermis Leyss. (Syn: B. inermis Leyss. ssp. inermis ) Smooth Brome. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial grass to 1 m., rhizomatous; Leaves, sheath, 8-11 cm., closed, ligule, <1 mm., membraneous, blade, 12-17 cm × 0.5 cm., flat, soft, with a distinguishing fold, usually described as an “M” or a “W” that is difficult to see when dry; Inflorescence, panicle, 15 cm. × 4 cm. wide, multiple 1° branches per node, mostly on one side of rachis; Spikelets, 1 per node on 1° and 2° panicle branches, 15-24 mm. × 5 mm. wide, laterally compressed, 2-6 florets per spikelet; Glumes, 2, keeled, glabrous, lower, 7-8 mm., veins 1 upper, 8-10 mm., <lowest floret; Rachilla, sparsely hairy on abaxial side, extended beyond uppermost floret or not; Callus, small, glabrous; Lemma, 11-12 mm., veins, 3, 5, 7, obvious, tip bifid, some awned; Awn (when present), 1.0-1.6 mm., arising near tip of lemma; Palea, 9 mm., veins ciliate. (Described from Coll. No. 1113, 26 May 2014, and Coll. No. 1219, 16 Jul 2015).
- South Illinois Open Space,
3941.
12/20/2024.
.
.
Festuca ovina L. Complex, hybrid or selection. CalPhotos. Jepson eFlora. SEINet Taxon.
- South Illinois Open Space, 3934. 12/20/2024. .
| Total number of taxa: | 11 |
| Native Taxa: (serif, italic, bold) | 7 |
| Non-native Taxa: (sans-serif, italic) | 4 |
| Nativity Undetermined: (default font, italic) | 0 |
| Listed Weeds: Identified as Weed | 0 |
Notes:
† -- Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/consortium/).
‡ -- Southwest Environmental Information Network, SEINet. 2009-2014. http//:swbiodiversity.org/seinet/index.php. Accessed from July 2009 to September 2014.
Locations Included in This Area
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Date and time this article was prepared: 11/3/2026 12:19:56 PM.
