Leymus triticoides |
Leymus salina |
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beardless lyme grass, beardless wildrye, creeping wildrye |
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Habit | Plants not cespitose, strongly rhizomatous. | Plants cespitose, sometimes weakly rhizomatous. | ||||||||
Culms | 45-125 cm tall, 1.8-3 mm thick, solitary or few together. |
35-140 cm tall, 1.5-3 mm thick, several together. |
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Leaves | exceeded by the spikes, often basally concentrated; sheaths glabrous or hairy, hairs 0.5-1 mm; auricles to 1 mm; ligules 0.2-1.3 mm, truncate, erose; blades 10-35 cm long, 3.5-10 mm wide, flat to involute, usually stiffly ascending, adaxial surfaces usually scabrous, often also sparsely hairy, hairs to 0.8 mm, most abundant proximally, veins 11-27, closely spaced, subequal, prominently ribbed. |
exceeded by the spikes; auricles to 1 mm; ligules 0.1-1 mm, truncate; blades 1-5 mm wide, flat to strongly involute, adaxial surfaces glabrous or sparsely to -9 prominently ribbed, subequal long, 4-11 mm wide, nodes below midspike with 1-2(3) spikelets, distal nodes with 1 spikelet; internodes 3.5-9 mm, surfaces glabrous, edges scabrous or strigillose. |
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Spikes | 5-20 cm long, 5-15 mm wide, with 2 spikelets at midspike, sometimes 1 or 3 at other nodes; internodes 5-11.5 mm, usually mostly smooth and glabrous, sometimes strigillose distally, edges ciliate, cilia to 0.4 mm. |
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Spikelets | 10-22 mm, with 3-7 florets. |
9-21 mm, pedicellate, pedicels to 1 mm, with 3-6 florets. |
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Glumes | 5-16 mm long, 0.5-1.2 mm wide, bases not overlapping, glabrous and smooth proximally, scabrous distally, tapering from below midlength to the subulate apices, stiff, keeled, the central portion thicker than the margins, 1(3)-veined, veins inconspicuous at midlength; calluses usually glabrous, occasionally with a few hairs, hairs about 0.1 mm; lemmas 5-12 mm, usually glabrous, occasionally sparsely hairy, hairs to 0.3 mm, apices acute, usually awned, awns to 3 mm; anthers 3-6 mm, dehiscent. |
unequal to subequal, to 12.5 mm long, 0.5-3.2 mm wide, subulate, stiff, keeled, the central portion thicker than the margins, tapering from below midlength, 0-1(3)-veined, veins inconspicuous at midlength; lower glumes 0-12 mm; upper glumes 3.5-12.5 mm; lemmas 7-12.5 mm, usually glabrous, sometimes sparsely strigillose, unawned or awned, awns to 2.5 mm; anthers 2.5-7.5 mm, dehiscent. |
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2n | = 28. |
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Leymus triticoides |
Leymus salina |
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Distribution |
AZ; CA; CO; ID; MT; NM; NV; OR; TX; UT; WA; WY; HI; BC
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Discussion | Leymus triticoides grows in dry to moist, often saline meadows. Its range extends from southern British Columbia to Montana, south to California, Arizona, and New Mexico, but its populations are widely scattered. It is not known from Mexico. There is considerable variation within the species, but no pattern of variation suggesting the existence of infraspecific taxa is known. It is very similar to L. multicaulis, strains of which were initially released as L. triticoides by the U.S. Department of Agriculture. The most consistent differences between them appear to be in the venation of the leaf blades and the vestiture of the calluses. Leymus triticoides is also very similar to L. simplex, differing from it in the number of spikelets at the midspike nodes. Leymus triticoides hybridizes with other species of Leymus; hybrids with L. mollis are called L. xvancouverensis (see p. 358), those with L. condensatus are called L. xmultiflorus (see p. 362). Hybrids with L. cinereus are known, but have not been formally named. Plants identified as Elymus arenicolus Scribn. & J.G. Sm. are here included in L. flavescens, but may represent hybrids between L. triticoides and L. flavescens. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
The three subspecies of Leymus salina differ in their pubescence and geographic distribution, with subsp. salina being the most common of the three. The specific epithet comes from the locality of the type collection: Salina Pass, Utah. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 24, p. 360. | FNA vol. 24, p. 364. | ||||||||
Parent taxa | Poaceae > subfam. Pooideae > tribe Triticeae > Leymus | Poaceae > subfam. Pooideae > tribe Triticeae > Leymus | ||||||||
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Subordinate taxa | ||||||||||
Synonyms | Elymus triticoides var. pubescens, Elymus triticoides | Elymus salinus, Elymus ambiguus var. salina | ||||||||
Name authority | (Buckley) Pilg. | (M.E. Jones) Á. Löve | ||||||||
Web links |
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