Flora of North America species comparison

30-60 cm, slender.

50-100 cm, erect;

nodes 2-3(4), glabrous, internodes glabrous or puberulent just below the nodes.

pilose-pubescent to nearly glabrous;

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

glabrous;

auricles absent;

ligules to 1 mm, glabrous, truncate;

blades (8)12-19(24) cm long, 4-8(14) mm wide, flat, glabrous, margins scabrous.

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

branches appressed to spreading, sometimes flexuous.

6-14 cm, erect, contracted;

branches erect or ascending.

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

15-30 mm, elliptic to lanceolate, terete to moderately laterally compressed, with (3)5-7 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.

glabrous or sparsely pubescent;

lower glumes 7-11 mm, 1(3)-veined;

upper glumes 9-12 mm, 3-veined;

lemmas 12-15 mm, elliptic, rounded over the midvein, backs and margins pubescent or nearly glabrous, apices obtuse, entire;

awns 2-5 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 2-3.5 mm.

= unknown.

= 14.