Eastern Mojave Vegetation Inflorescence of Coll. No. 2105, Elymus lanceolatus  
 

 

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  Poaceae Elymus lanceolatus
Scanned 31 October 2019.

Plants of Jefferson County Open Space
Jefferson County, Colorado
Poaceae

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

Tin Cup Ridge, Jefferson County, Colorado. Lower east slopes of the hogback locally called Tin Cup Ridge, the northward extension of Dinosaur Ridge into Golden, 6.44 km. south southeast of the GNIS location of Golden. 39.7129N, 105.2043W. WGS 1984 Elev. 1910 m. Growing near Rhus trilobata on east-facing moderate slope. Collected with Eriogonum umbellatum var. umbellatum. 1 of 4 clumps dug up has a clearly-defined rhizome

Collected by permit: Jefferson County Open Space, 2019, issued: Mar 1, 2019, to: Tom Schweich.

Tom Schweich 2105. 30-Jun-2019

Coll. No. 2105, 30 June 2019, characters observed: Perennial, to 65 cm., rhizomatous; Leaves, blade and sheath differentiated; Sheath, 95 mm., open, pilose distally; Ligule, membraneous, 0.5 mm., auricles, 2 mm.; Blade, 190 mm. × 3 mm. wide, involute, veins prominent and pilose adaxially; Inflorescence, 1 per culm, bilateral spike rachis internodes 5.0-5.5(8.0) mm.; Spikelets, many, 19 mm. × 6 mm. wide, 3.5-3.8(2.4) × internode, closely spaced, reaching midlength of that above, similar, 1(2) per node, stalked, pedicels, 1 mm.; Compression, lateral; Disarticulation, between the florets; Glumes, lower, 11 mm., narrowly lanceolate (not subulate), veins, #5, upper, 11.5 mm., ≤lowest floret, widest at middle, veins, #7-9, keeled, sparsely hairy throughout, awn-tipped; Florets, 7 per spikelet, bisexual; Lemma, 9.5 mm., >glumes, lanceolate, rolled, pilose, veins, #7, tip, entire, awns, #1, 2 mm., or possible merely awn-tipped; Palea, 8.5 mm., <lemma, membraneous, keel, ciliate, veins, green, margin, glabrous, tip, bifid; Anthers, #3, 4.7 mm., yellow; Stigma, feathery; Achene, unknown.

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Date and time this page was prepared: 8/9/2020 10:26:42 AM