Flora of North America species comparison

8-160 cm, prostrate to erect when young, becoming erect at maturity.

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

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.

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.

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

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

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

disarticulation beneath each floret;

disarticulation scars of all florets round to ovate or 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, 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.

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.

= 42.

= 42.