Flora of North America species comparison

30-60 cm, slender.

20-90 cm, erect or decumbent, puberulent below the panicle.

pilose-pubescent to nearly glabrous;

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

softly pilose, hairs often retrorse or spreading;

auricles absent;

ligules 2-3 mm, glabrous, obtuse, lacerate or erose;

blades 3.5-27 cm long, 1-9 mm wide, both surfaces pilose.

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

branches appressed to spreading, sometimes flexuous.

13-25 cm long, 2-12 cm wide, erect to spreading;

branches 1-7 cm, stiffly erect to ascending or spreading, with 1 or 2 spikelets.

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

25-70 mm, sides parallel or diverging distally, moderately laterally compressed, with 4-11 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.

smooth or scabrous, margins hyaline;

lower glumes 15-25 mm, 1-3-veined;

upper glumes 20-35 mm, 3-5-veined;

lemmas 20-35 mm, linear-lanceolate, scabrous, 7-veined, rounded over the midvein, margins hyaline, apices bifid, acuminate, teeth 3-5 mm;

awns 30-65 mm, straight, arising 1.5 mm or more below the lemma apices;

anthers 0.5-1 mm.

= unknown.

= 42, 56.