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.

90-150 cm, erect;

nodes 2-4, pubescent or puberulent;

internodes glabrous to pubescent, pilose to densely pubescent 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.

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

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

7-13.5 cm, open;

branches erect, ascending and appressed to slightly spreading.

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 3-9(11) 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.

usually glabrous, occasionally scabrous or pubescent;

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

upper glumes 7-11 mm, 3(5)-veined, sometimes mucronate;

lemmas 9-16 mm, elliptic, rounded over the midvein, backs usually pubescent, sometimes glabrous or scabrous, margins pubescent or scabrous, apices obtuse, entire;

awns (4)5.5-8 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 3-5 mm.

sheaths sparingly to densely pilose, hairs 2-4 mm, occasionally glabrous;

upper sheaths hairy, hairs to 1 mm, collars glabrous or pilose, hairs to 4 mm;

auricles absent;

ligules 1-3 mm, usually glabrous, occasionally pilose, obtuse, erose;

blades 7-24 cm long, 3-12 mm wide, flat, usually glabrous, sometimes hairy.

= 14.

= 14.