Awnless Wildrye - Elymus submuticus
Elymus curvatus, Elymus virginicus var. submuticus
Cespitose perennials; culms 60-110 cm tall, stiffly erect or sometimes geniculate at base. Leaf shaths glabrous, often reddish brown; auricles to 1 mm or absent; ligules less than 1 mm long, ciliolate; blades 5-15 mm wide, upper surface smooth to somewhat scabrous. Spikes 9-15 cm long, up to 1.3 cm wide, erect, exserted or the bases slightly inserted; spikelets 2 per node. Spikelets 10-15 mm long, appressed, often reddish brown at maturity; florets (2)3-4(5) (only the lowest functional). Glumes equal or subequal, 7-15 mm long, the basal 2-3 mm portion indurate (hardened), terete, 1.2-2.1 mm wide and without evident venation, the upper portion of glume bodies widening and becoming 3-5 veined and strongly bowed out; disarticulation below glumes and beneath florets. Lemmas 6-10 mm long, glabrous or scabrous (rarely hirsute), awns straight and mostly 1-4 mm (rarely 5-10 mm on lemmas of uppermost spikelets); paleas 6-10 mm, obtuse, often emarginate. Anthers 1.5-3 mmm long (adapted from: Barkworth et al., 2007, Flora of N. America, Vol. 24, who treat the species as E. curvatus).
Widespread across Canada and northern 2/3 of USA but only common in Great Plains east with any regularity to MN, WI and IL (less frequent farther east) (Barkworth et al., 2007, Flora of North America, Vol. 24).
Observations in Montana Natural Heritage Program Database
Number of Observations:
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(Observations spanning multiple months or years are excluded from time charts)
Moist or damp soils of open forests, thickets, grasslands, ditches, and disturbed ground, especially in bottomlands (Barkeworth et al., 2007, Flora of N. America, Vol. 24).
- Additional ReferencesLegend: View Online Publication
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- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.