Flora of North America species comparison

30-120 cm tall, 2-4 mm thick, erect or decumbent.

10-40 cm, erect or ascending, often puberulent below the panicle.

usually densely, often retrorsely, hairy, hairs sometimes confined to the throat;

auricles absent;

ligules 1-4 mm, glabrous or pilose, obtuse, lacerate to erose;

blades 4-30 cm long, 3-10 mm wide, flat, glabrous or hairy on both surfaces.

softly pubescent to pilose;

auricles absent;

ligules 1-3(4) mm, pubescent, obtuse, lacerate;

blades to 15 cm long, 1-5 mm wide, flat, pubescent on both surfaces.

9-28 cm, usually open, erect or nodding;

lower branches shorter than 10 cm, 1-4 per node, spreading or ascending, with up to 5 spikelets variously distributed.

2-10 cm long, 2-5 cm wide, erect, dense, often reddish brown;

branches 0.1-1 cm, ascending, never drooping, not readily visible, with 1 or 2 spikelets.

(17)20-40 mm, shorter than at least some pedicels and branches, elliptic to lanceolate, strongly laterally compressed, not crowded or overlapping, with 4-12 florets.

18-25 mm, much longer than the panicle branches, densely crowded, subsessile, with parallel sides or widening distally, moderately laterally compressed, with 4-8 florets.

smooth or scabrous, glabrous or pubescent;

lower glumes 7-12 mm, 5-7(9)-veined;

upper glumes 9-17 mm, 7-9(11)-veined, shorter than the lowest lemma;

lemmas 11-20 mm, lanceolate, laterally compressed, strongly keeled, usually glabrous, sometimes pubescent distally, smooth or scabrous, 9-13-veined, veins often raised and riblike, margins sometimes conspicuous, hyaline, whitish or partly purplish, apices entire or toothed, teeth acute, shorter than 1 mm;

awns absent or to 10 mm;

anthers 0.5-1 mm in cleistogamous florets, 2-5 mm in chasmogamous florets.

pilose, margins hyaline;

lower glumes 5-8 mm, 1(3)-veined;

upper glumes 8-12 mm, 3-5-veined;

lemmas 10-15 mm, linear-lanceolate, pubescent to pilose, 7-veined.

over the midvein, margins hyaline, apices acuminate, teeth 1-3 mm;

awns 8-20 mm, straight, reddish, arising 1.5 mm or more below the lemma apices;

anthers 0.5-1 mm.

= 42.

= 14, 28.