Flora of North America species comparison

60-170 cm, erect;

nodes (5)6-8, pubescent;

internodes usually glabrous, sometimes pubescent near the nodes.

50-130 cm, erect, single or a few together;

nodes (2)3-5(6), usually glabrous, rarely pubescent;

internodes usually glabrous, rarely pubescent.

pilose, midrib of the culm leaves not abruptly narrowed just below the collar;

auricles absent;

ligules 2-4 mm, glabrous, truncate, erose or lacerate;

blades 20-35(37) mm long, 6-16 mm wide, flat, abaxial surfaces glabrous, adaxial surfaces pilose.

usually glabrous, rarely pubescent or pilose;

auricles sometimes present;

ligules to 3 mm, glabrous, truncate, erose;

blades 11-35(42) cm long, 5-15 mm wide, flat, usually glabrous, rarely pubescent or pilose.

10-25 cm, open, nodding;

branches ascending, spreading, or drooping.

10-20 cm, open, erect;

branches ascending or spreading.

20-30 mm, elliptic to lanceolate, terete to moderately laterally compressed, with (4)6-10 florets.

20-40 mm, elliptic to lanceolate, terete to moderately laterally compressed, sometimes purplish, with (5)8-10 florets.

pubescent;

lower glumes 6-8.5 mm, 1(3)-veined;

upper glumes 8-11.5 mm, 3-veined, not mucronate;

lemmas 10-12 mm, lanceolate, rounded over the midvein, backs pubescent, margins more densely so, apices acute, entire;

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

anthers 2-4 mm.

glabrous;

lower glumes (4)6-8(9) mm, 1(3)-veined;

upper glumes (5)7-10 mm, 3-veined;

lemmas 9-13 mm, elliptic to lanceolate, rounded over the midvein, usually glabrous and smooth, sometimes scabrous, margins sometimes sparsely puberulent, the basal part of the backs less frequently so, apices acute to obtuse, entire;

awns absent or to 3 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 3.5-6 mm.

= 28.

= 28, 56.