Flora of North America species comparison

30-60 cm, bases orange-brown;

nodes 3-6;

basal branching intravaginal.

mostly glabrous, throats densely ciliate, basal sheaths reddish brown, flat and ribbonlike with age;

ligules varying within a plant, lower ligules 0.3-1 mm, densely hairy and ciliate, hairs 0.2-1 mm, often longer than the basal membrane, upper ligules to 2.5 mm, hyaline to scarious, glabrous or hairy, usually less hairy than the lower ligules, sometimes ciliate;

blades 10-30 cm long, 0.5-2 mm wide when flat, usually rolled, to 1 mm in diameter, abaxial surfaces glabrous, smooth, adaxial surfaces pilose.

10-15 cm, dense, frequently partially included in the upper leaf sheaths at maturity;

branches ascending.

16-24 mm.

linear-lanceolate, glabrous, tapering from below midlength to the narrowly acute apices;

lower glumes 16-24 mm, 1-veined;

upper glumes 13-19 mm, 3-5-veined;

florets (6)8-10 mm;

calluses 0.8-1.6(3) mm, sharp;

lemmas densely and evenly hairy, hairs about 0.5 mm, without a pappus;

awns 35-45(80) mm, once-geniculate, first segment pilose, hairs 3-8 mm, terminal segment glabrous, smooth;

paleas 3.2-5.1 mm, 2/5 – 2/3 (4/5) the length of the lemmas, usually hairy, hairs about 0.5 mm.

= 66, 68, about 74.