Flora of North America species comparison

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

8-160 cm, prostrate to erect when young, 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.

of the basal leaves with scattered hairs, upper sheaths glabrous;

ligules 4-6 mm, acute;

blades 10-45 cm long, 3-15 mm wide, scabridulous.

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

7-40 cm long, 5-20 cm wide, nodding.

21-30 mm, with 2-3 florets;

disarticulation beneath each floret;

disarticulation scars elliptic to triangular.

18-32 mm, with 2(3) florets;

disarticulation beneath each floret;

disarticulation scars of all florets round to ovate or triangular.

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, 18-32 mm, 9-11-veined;

calluses bearded, hairs to 1/4 the length of the lemmas;

lemmas 14-22 mm, usually densely strigose below midlength, sometimes sparsely strigose or glabrous, veins not extending beyond the apices, apices usually bifid, teeth 0.3-1.5 mm, awns 23-42 mm, arising in the middle 1/3 of the lemmas;

lodicules without lobes on the wings;

anthers about 3 mm.

= 28.

= 42.