Eastern Mojave Vegetation Spikelets of Coll. No. 2350, Secale cereale  
 

 

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  Poaceae Secale cereale
Scanned 5 December 2020.

Native and Naturalized Flora of the Golden Area, Jefferson County, Colorado
Poaceae

Secale cereale L.  Cereal Rye.

Cressmans Gulch (lower), Jefferson County, Colorado. Northwesternmost Golden, between Pine Ridge Road and Dakota Ridge, on a terrace above Cressmans Gulch, 4.50 km. north northwest of the GNIS location of Golden. 39.7831N, 105.2396W. WGS 1984 Elev. 1870 m. Not rhizomatous, bi-lateral spike, two florets per spikelet, lemma asymetrical and keel ciliate. Also collected here: Poa secunda, Linum lewisii, and Lupinus argenteus.

Collected by permit: City of Golden, 2020, issued: Apr 9, 2020, to: Tom Schweich.

Tom Schweich 2350. 12-Jun-2020

Annual, erect, 75-100 cm., not rhizomatous; Roots, fibrous; Stem, herbaceous; Nodes, constricted, purple; Leaf, sheath, 115 mm., open, ligule, minimal, membraneous, auricle, 0.6-1.0 mm., blade, 170 mm. × 5 mm. wide, flat, minutely scabrous; Inflorescence, 1 per culm, terminal 2-sided spike, 100-110 mm. × 9 mm. wide; Rachis, nodes 2.0-3.5 mm., bilateral tufts of straight hairs; Spikelets, many, 1 per node, sessile, bases not embedded in rachis; Disarticulation, below the glumes; Glumes, 2, awl-like, 8-9 mm., ±equal, <lowest floret, keeled, purplish distally, appearing to hide the rachis but not the lemmas; Florets 2, appear side-to-side, fertile; Lemma, 12-13 mm., asymmetric in x-section, veins, 5, keeled, keel ciliate, margins, one ciliate, the other less so, awned; Awns, attached end, 11-16 mm., short proximally in the inflorescence, lengthening distally, straight to wavy, some slightly twisted; Palea, 11-12 mm, membraneous (Described from Coll. No. 1110 and 2350).

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Date and time this page was prepared: 10/19/2021 2:59:39 PM