Common names: Sierra wheatgrass
Synonyms: Agropyron pringlei unknown
Treatment appears in FNA Volume 24. Treatment on page 332.
Plants cespitose, not rhizomatous. Culms 20-50 cm, prostrate or decumbent and geniculate; nodes 1-2, exposed, glabrous. Leaves basally concentrated; sheaths glabrous; auricles usually present, to 1 mm on the lower leaves; ligules 0.2-0.5 mm, erose; blades 1-5 mm wide, flat, abaxial surfaces smooth, glabrous, adaxial surfaces prominently ridged over the veins, with scattered hairs, hairs to 0.2 mm, veins closely spaced. Spikes 5-15 cm long, 1.5-2.5 cm wide including the awns, 0.7-1.2 cm wide excluding the awns, flexuous, erect to nodding distally, with 1 spikelet at most nodes, occasionally some of the lower nodes with 2 spikelets; internodes 5-15 mm long, 0.2-0.5 mm wide, both surfaces glabrous, edges ciliate, not scabrous. Spikelets 15-20 mm, ascending to divergent, with 3-7 florets; rachillas glabrous; disarticulation above the glumes, beneath each floret. Glumes subequal, 6-9 mm long, 0.7-1 mm wide, lanceolate, glabrous, the bases evidently veined, apices entire, tapering into a 3-10 mm awn; lemmas 12-16 mm, glabrous, sometimes scabridulous, apices bidentate, awned, awns 15-30 mm, arcuately diverging to strongly recurved; paleas subequal to the lemmas, apices about 0.4 mm wide; anthers 2-3.5 mm. 2n = 28.

Discussion

Elymus sierrae is best known from rocky slopes and ridgetops in the Sierra Nevada, at 2100-3400 m, and is also found in Washington and Oregon. It resembles E. scribneri (see previous), differing in its non-disarticulating rachises, longer rachis internodes, and longer anthers. Hybrids with E. elymoides (p. 318) have glumes with awns 15+ mm long, and some spikelets with narrower glume bases and shorter anthers. Specimens with wide-margined glumes suggest hybridization with E. violaceus (p. 324).

References

None.

Lower Taxa

No lower taxa listed.

Facts about "Elymus sierrae"
AuthorMary E. Barkworth +, Julian J.N. Campbell + and Bjorn Salomon +
AuthorityGould +
Common nameSierra wheatgrass +
DistributionIdaho +, Mont. +, Nebr. +, N.C. +, Conn. +, N.J. +, N.Y. +, Mass. +, Wash. +, Va. +, W.Va. +, Ark. +, Iowa +, Kans. +, Mo. +, N.Dak. +, Okla. +, S.Dak. +, Ariz. +, D.C +, Ga. +, Ill. +, Ky. +, Mich. +, N.Mex. +, Pa. +, S.C. +, Tenn. +, Wyo. +, Del. +, Miss. +, Ind. +, Oreg. +, Maine +, N.H. +, R.I. +, Vt. +, Ala. +, Fla. +, La. +, Md. +, N.S. +, Ohio +, Tex. +, Wis. +, Colo. +, Calif. +, Alaska +, Utah +, Nev. +, Alta. +, B.C. +, Greenland +, Man. +, N.B. +, Nfld. And Labr. +, N.W.T. +, Nunavut +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon + and Minn. +
IllustratorCindy Roché and Annaliese Miller +
ReferenceNone +
Source xmlhttps://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/314eb390f968962f596ae85f506b4b3db8683b1b/coarse grained fna xml/V24/V24 471.xml +
SynonymsAgropyron pringlei +
Taxon familyPoaceae +
Taxon nameElymus sierrae +
Taxon parentElymus +
Taxon rankspecies +
VolumeVolume 24 +