Flora of North America species comparison

30-60 cm, slender.

90-150 cm, erect;

nodes 1-2(3), pubescent or puberulent;

internodes usually puberulent, occasionally glabrous, pilose to densely pubescent below the nodes.

pilose-pubescent to nearly glabrous;

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

densely pubescent to pilose, hairs to 1 mm, collars pilose, hairs to 2 mm;

auricles absent;

ligules 0.5-2.5 mm long, sparsely to densely pubescent, obtuse, erose;

blades 7.5-16.5 cm long, 3-12 mm wide, flat, densely pubescent on both surfaces.

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

branches appressed to spreading, sometimes flexuous.

5-16 cm, open;

branches erect, ascending and appressed to slightly spreading.

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

25-35(45) mm, terete to moderately laterally compressed, with 3-7 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.

sparsely to densely pubescent;

lower glumes 5-8(9) mm, 1(3)-veined;

upper glumes (7)8-9 mm, 3-veined, sometimes mucronate;

lemmas 10-14 mm, elliptic, rounded over the midvein, backs sparsely to densely pubescent, margins pubescent, apices entire;

awns 3.5-7 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 3-6 mm.

= unknown.

= unknown.