Flora of North America species comparison

60-80 (150) cm, initially prostrate, usually becoming erect.

30-120 cm, initially prostrate, becoming erect at maturity.

of the basal leaves pilose, upper sheaths usually glabrous;

ligules 1-6 mm, obtuse;

blades 6-30 cm long, 2-20 mm wide, glabrous or pilose.

glabrous or hairy;

ligules 3-8 mm, acute to truncate-mucronate;

blades 8-60 cm long, 4-18 mm wide, scabridulous, often ciliolate on the margins.

15-35.5 (50) cm long, 6-12 cm wide, erect or nodding.

10-45 cm long, 5-25 cm wide.

21-30 mm, with 2-3 florets;

disarticulation beneath each floret;

disarticulation scars elliptic to triangular.

24-50 mm, with 2-5 florets;

disarticulation beneath the basal floret the florets falling as a unit;

disarticulation scar oval to round-elliptic.

subequal, 15-30 mm, 7-9-veined;

calluses bearded, hairs 2-3 mm;

lemmas 15-26 mm, densely strigose below midlength, apices acute, biaristate, 2 veins extending 2-4 mm beyond the apices, awns 30-45 mm, arising about midlength, geniculate;

lodicules narrowly triangular, without lobes on the wings;

anthers 2.5-4 mm.

subequal, 20-50 mm, 9-11-veined;

calluses bearded, hairs to 1/5 the length of the lemmas;

lemmas 17-40 mm, usually densely strigose below midlength, sometimes sparsely strigose, glabrous or scabridulous, apices bidentate to bisubulate teeth 1-1.5 mm, awns 30-90 mm, arising in the middle 1/3;

lodicules without a lobe on the wing;

anthers 2.5-4 mm.

= 28.

= 42.