Flora of North America species comparison

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

erect;

nodes often pubescent.

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;

ligules 4-5 mm, obtuse or acute;

blades 12-25 cm long, 7-12 mm wide.

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

15-30 cm, equilateral, sometimes slightly secund.

21-30 mm, with 2-3 florets;

disarticulation beneath each floret;

disarticulation scars elliptic to triangular.

15-24 mm, with 2-4 florets;

disarticulation beneath each floret;

disarticulation scars of the lower floret(s) in a spikelet oval to round, those of the third and fourth (and sometimes the second) florets heart-shaped.

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.

equal, 15-23 mm, 7-9(11)-veined;

calluses bearded;

lemmas about 21 mm, usually glabrous, sometimes pubescent beneath the awn insertion, irregularly bidenticulate to bisubulate, veins not extending beyond the apices, awns about 30 mm, arising at midlength;

lodicules with a small side lobe;

anthers about 2 mm.

= 28.

= 42.