Flora of North America species comparison

30-90 cm tall, to 3 mm thick, erect.

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

retrorsely pilose, sometimes mostly glabrous, throats sometimes with hairs;

auricles absent;

ligules 1-4 mm, usually glabrous, obtuse, erose;

blades 8-18 cm long, 3-9 mm wide, flat, sparsely pilose on both surfaces or the abaxial surfaces 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.

12-25 cm, somewhat contracted or open;

lower branches shorter than 10 cm, 2-3(5) per node, initially erect to ascending, spreading at maturity, with 1-2 spikelets variously distributed.

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.

18-25 mm, elliptic to lanceolate, strongly laterally compressed, with 4-8 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.

subequal, smooth or scabrous;

lower glumes 8-12.5 mm, 3-veined;

upper glumes 9.5-14 mm, 7-veined, about as long as the lowest lemma;

lemmas 9.5-14 mm, lanceolate, laterally compressed, prominently 7-veined, strongly keeled at least distally, glabrous or pubescent distally or throughout, marginal hairs, if present, longer than those elsewhere, apices entire or with acute teeth shorter than 1 mm;

awns 6-13 mm, sometimes slightly geniculate;

anthers 0.4-0.5 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.

= 84.

= 28.