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.

40-190 cm, erect;

nodes 2-4, usually pubescent;

internodes usually pubescent.

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.

with long, stiff, retrorse hairs, at least on the lower portion, midrib of the culm leaves not abruptly narrowed just below the collar;

auricles present;

ligules 2-3.5 mm, glabrous or sparsely pilose, rounded to truncate, erose;

blades 10-60 cm long, 6-15 mm wide, flat, drooping, glabrous or sparsely hairy.

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

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

15-40 cm long, open, lax, drooping;

branches spreading or drooping.

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

20-40 mm, elliptic to lanceolate, terete to moderately laterally compressed, with 3-10 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.

glabrous, scabridulous over the veins;

lower glumes 5-8 mm, 1-veined;

upper glumes 8-11 mm, 3-veined, mucronate;

lemmas 10-14 mm, lanceolate, rounded over the midvein, margins and at least the lower 1/2 of the backs pubescent, apices acute, entire or emarginate, lobes shorter than 1 mm;

awns 4-7 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 2.5-4 mm.

= 14.

= 14, 28, 42.