Flora of North America species comparison

65-120(150) cm, erect;

nodes (3)5-7(9), usually pubescent, sometimes glabrous;

internodes pubescent or glabrous.

90-150 cm, erect;

nodes 2-4, pubescent or puberulent;

internodes glabrous to pubescent, pilose to densely pubescent below the nodes.

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

auricles absent;

ligules 0.5-2 mm, glabrous, obtuse to truncate, erose;

blades 12-32 cm long, 6-15(19) mm wide, flat, 1 or both surfaces glabrous or hairy.

10-25 cm, open, usually nodding;

branches usually spreading, sometimes ascending, often drooping.

7-13.5 cm, open;

branches erect, ascending and appressed to slightly spreading.

(13)15-30 mm, elliptic to lanceolate, terete to moderately laterally compressed, with (4)5-10(13) florets.

20-40 mm, elliptic to lanceolate, terete to moderately laterally compressed, with 3-9(11) florets.

usually pubescent, rarely glabrous;

lower glumes 4-8 mm, 1-veined;

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

lemmas 8-12 mm, lanceolate, rounded over the midvein, backs and margins usually hairy, sometimes glabrous or scabrous, apices subulate to acute, entire;

awns (3)4-7(8) mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 2-4(5) 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.