Flora of North America species comparison

30-60 cm, slender.

34-70 cm, erect or ascending, glabrous or puberulent below the panicle.

pilose-pubescent to nearly glabrous;

blades 7-28 cm long, 2-9 mm wide, pilose or glabrous.

densely short-pubescent or glabrous;

auricles absent;

ligules 1.5-2 mm, glabrous, obtuse, erose;

blades 4-20 cm long, 1-5 mm wide, flat, both surfaces pubescent or glabrous.

10-20 cm long, 3-9 cm wide, erect, dense;

branches appressed to spreading, sometimes flexuous.

3-15 cm long, 2-6 cm wide, open, erect;

branches (at least some) 1-3+ cm, ascending to spreading, never drooping, usually visible, with 1 or 2 spikelets.

15-20 mm, elliptic to lanceolate, more or less terete, with 3-9 florets.

30-50 mm, longer than the panicle branches, not densely crowded, with parallel sides or widening distally, moderately laterally compressed, with 6-10 florets.

glabrous, acuminate;

lower glumes 8-10 mm, 1-veined;

upper glumes 12-16 mm, 3(5)-veined;

lemmas 11-14 mm, lanceolate to linear-lanceolate, sparsely pubescent, 5-veined, rounded over the midvein, apices acuminate, bifid, teeth 2-3 mm, usually aristate, sometimes acuminate;

awns 13-20 mm, geniculate, strongly to moderately twisted in the basal portion, arising 1.5 mm or more below the lemma apices;

anthers 2-2.5 mm.

pilose, margins hyaline;

lower glumes 5-10 mm, 1-veined;

upper glumes 10-15 mm, 3-veined;

lemmas 12-20 mm, linear-lanceolate, often arcuate, pubescent, with longer hairs near the margins, 5-7-veined, rounded over the midvein, margins hyaline, apices acuminate, teeth 1.5-3 mm;

awns 12-23 mm, straight or arcuate, arising 1.5 mm or more below the lemma apices;

anthers 0.5-1 mm.

= unknown.

= 28.