Flora of North America species comparison

60-170 cm, erect;

nodes (5)6-8, pubescent;

internodes usually glabrous, sometimes pubescent near the nodes.

80-150 cm, erect;

nodes 9-20, glabrous, usually concealed by the leaf sheaths;

internodes usually glabrous, sometimes hairy just below the nodes.

pilose, midrib of the culm leaves not abruptly narrowed just below the collar;

auricles absent;

ligules 2-4 mm, glabrous, truncate, erose or lacerate;

blades 20-35(37) mm long, 6-16 mm wide, flat, abaxial surfaces glabrous, adaxial surfaces pilose.

overlapping, densely to moderately retrorsely pilose or glabrous over most of their surface, throats and collars densely pilose;

auricles 1-2.5 mm on most lower leaves;

ligules 0.8-1.4 mm, hirsute, ciliate, truncate, erose;

blades 20-30 cm long, 5-15 mm wide, flat, usually glabrous, rarely pilose, with 2 prominent flanges at the collar.

10-25 cm, open, nodding;

branches ascending, spreading, or drooping.

10-22 cm, open, nodding;

branches spreading to ascending.

20-30 mm, elliptic to lanceolate, terete to moderately laterally compressed, with (4)6-10 florets.

15-30 mm, elliptic to lanceolate, terete to moderately laterally compressed, with 4-9 florets.

pubescent;

lower glumes 6-8.5 mm, 1(3)-veined;

upper glumes 8-11.5 mm, 3-veined, not mucronate;

lemmas 10-12 mm, lanceolate, rounded over the midvein, backs pubescent, margins more densely so, apices acute, entire;

awns 3.5-7 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 2-4 mm.

pubescent or glabrous;

lower glumes 4-7.5 mm, 1(3)-veined;

upper glumes 6-9 mm, 3-veined, sometimes mucronate;

lemmas 8-14 mm, elliptic to lanceolate, rounded over the midvein, backs glabrous or pilose to pubescent, margins long-pilose, apices obtuse to acute, entire;

awns 3-4.5(7) mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 2-3 mm.

= 28.

= 14.