Flora of North America species comparison

30-60 cm, slender.

35-100 cm, erect or geniculate near the base, glabrous.

pilose-pubescent to nearly glabrous;

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

densely pubescent;

auricles absent;

ligules 2-2.5 mm, glabrous, acute, lacerate;

blades 4-20 cm long, 1-6 mm wide, pubescent on both surfaces.

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

branches appressed to spreading, sometimes flexuous.

10-20 cm long, 5-12 cm wide, open;

branches 2-10 cm, spreading, ascending or drooping, rarely with more than 3 spikelets.

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

20-35 mm, usually shorter than the panicle branches, sides parallel or diverging distally, moderately laterally compressed, with 5-9 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 6-14 mm, 1(3)-veined;

upper glumes 10-20 mm, 3(5)-veined;

lemmas 14-20 mm, narrowly lanceolate, pubescent or puberulent, 7(9)-veined, rounded over the midvein, margins hyaline, apices acuminate, bifid, teeth 1-3 mm;

awns 15-30 mm, straight, arising 1.5 mm or more below the lemma apices;

anthers 1-1.4 mm.

= unknown.

= 14,28.