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.

10-40 cm, erect or ascending, often puberulent below the panicle.

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.

softly pubescent to pilose;

auricles absent;

ligules 1-3(4) mm, pubescent, obtuse, lacerate;

blades to 15 cm long, 1-5 mm wide, flat, pubescent on both surfaces.

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

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

2-10 cm long, 2-5 cm wide, erect, dense, often reddish brown;

branches 0.1-1 cm, ascending, never drooping, not readily visible, with 1 or 2 spikelets.

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

18-25 mm, much longer than the panicle branches, densely crowded, subsessile, with parallel sides or widening distally, moderately laterally compressed, with 4-8 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.

pilose, margins hyaline;

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

upper glumes 8-12 mm, 3-5-veined;

lemmas 10-15 mm, linear-lanceolate, pubescent to pilose, 7-veined.

over the midvein, margins hyaline, apices acuminate, teeth 1-3 mm;

awns 8-20 mm, straight, reddish, arising 1.5 mm or more below the lemma apices;

anthers 0.5-1 mm.

= 14.

= 14, 28.