Flora of North America species comparison

30-100 cm, erect;

nodes (2)3-4(5), glabrous or pubescent;

internodes mostly glabrous, puberulent near the nodes.

50-100 cm, erect;

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

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

auricles absent;

ligules to 2.5 mm, glabrous, truncate or obtuse, erose or lacerate;

blades (3)10-25(35) cm long, 2-5(6) mm wide, flat, not glaucous, both surfaces usually glabrous, sometimes the adaxial surface pilose.

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.

7-20 cm, open, nodding, often 1-sided;

branches slender, ascending to spreading, often recurved and flexuous.

6-14 cm, erect, contracted;

branches erect or ascending.

12-38 mm, elliptic to lanceolate, terete to moderately laterally compressed, with (3)5-11(13) florets.

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

usually pubescent, rarely glabrous;

lower glumes 5-7(9) mm, usually 3-veined, sometimes 1-veined;

upper glumes 6-10 mm, 3-veined, not mucronate;

lemmas 8-14 mm, elliptic, rounded over the midvein, usually pubescent or pilose, margins often with longer hairs, backs and margins rarely glabrous, apices acute or obtuse to truncate, entire;

awns (1)2-3(3.5) mm, straight, arising less than 1.5 mm below the lemma apices;

anthers (1)2-3 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.

= 14.

= 14.