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.

70-180 cm, erect;

nodes 3-7, pubescent or puberulent;

internodes pubescent, puberulent, or glabrous.

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.

densely pubescent, hairs to 1 mm, collars with hairs to 2 mm, midrib of the culm leaves not abruptly narrowed just below the collar;

auricles sometimes present;

ligules 1-3 mm, densely pubescent to pilose, obtuse, lacerate;

blades (13)18-38 cm long, 3-12 mm wide, flat, sparsely to densely pubescent on both surfaces.

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

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

14-27 cm long, very open, nodding;

branches flexuous, usually widely spreading, with spikelets near the tips.

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

20-37(45) mm, elliptic to lanceolate, terete to moderately laterally compressed, with 4-9(10) 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.

pubescent, with prominent veins, margins not bronze-tinged;

lower glumes 4-8.5 mm, (1)3-veined;

upper glumes 7-10 mm, 3(5)-veined, not mucronate;

lemmas 9.5-14 mm, lanceolate, rounded over the midvein, backs pilose, pubescent, or glabrous, margins pilose, not bronze-tinged, apices subulate to acute, entire;

awns 3-7 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 3-6 mm.

= 14.

= 14.