Eastern Mojave Vegetation Spikelet of Coll. No. 3080, Elymus lanceolatus Agropyron cristatum.  
 

 

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If you have a question or a comment about this photograph 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. 		  Poaceae Agropyron cristatum
Photographed 31 December 2023.

Plants of the Douglas Mountain Study Area
Jefferson County Open Space, Colorado, USA
Poaceae

Elymus lanceolatus (Scribn. & J. G. Sm.) Gould.  Thickspike Wheatgrass.

Agropyron cristatum, Jan Wingate, 4/23/2024.

Guy Gulch, Jefferson County, Colorado. Dry former roadside in the shaded mouth of a small gulch tributary to Guy Gulch, 192 m. southwest across County Road 70 from the Centennial Ranch house, 2.56 km. south of Mount Tom, 12.3 km. west northwest of the GNIS location of Golden. 39.7935°N, 105.3556°W. WGS 1984 Elev. 2353 m.

Collected by permit: Jefferson County Open Space, 2023, issued: Apr 10, 2023, to: Tom Schweich.

Tom Schweich, with Cindy Trujillo and John Vickery 3080. 12-Jul-2023

Coll. No. 3080, 12 July 2023, characters observed: Perennial grass, to 75 cm., not obviously rhizomatous; Leaves, sheath, 93 mm., open, ligule, membranous, auricles, minimal, 0.5 mm., lanceolate, blade, 160 mm. × 3.2 mm. wide, flat, adaxial pilose; Inflorescence, 2-sided spike, 45 mm. × 7 mm. wide; Spikelets, many, 12 mm. × 12 mm. wide, overlapping about ⅔ or 8 mm., similar, borne singly, glumes and florets spreading; Glumes, lower, 5 mm. + awn, 3 mm. Veins, 5, upper, 5 mm. × 1.5 mm. wide + awn 3.5 mm., <lowest floret, veins, 5, keeled; Florets, 5 per spikelet; Lemma, 7.5 mm., >glumes, keeled, barely scabrous on veins, veins, 5, tip, bifid, awns, #1, 2.8 mm., straight; Palea, 5.8 mm., <lemma, membranous, keel, ciliate, tip, bifid; Anthers, 3 mm.

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Date and time this page was prepared: 12/8/2024 2:16:21 PM