Flora of North America species comparison

60-170 cm, erect;

nodes (5)6-8, pubescent;

internodes usually glabrous, sometimes pubescent near the nodes.

(60)70-140 cm, erect or spreading;

nodes 5-9, pubescent or glabrous, often concealed by the sheaths;

internodes usually glabrous.

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.

usually retrorsely pilose, sometimes glabrous, with a dense line of hairs at the collar, lower sheaths often sericeous;

auricles absent;

ligules 0.4-1 mm, often hairy, truncate, erose, ciliolate;

blades 15-30 cm long, 5-12 mm wide, often shiny yellow-green, flat, abaxial surfaces pilose, adaxial surfaces glabrous or pilose over the veins.

10-25 cm, open, nodding;

branches ascending, spreading, or drooping.

9-25 cm, open, nodding;

branches ascending or spreading, often recurved.

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

18-30 mm, elliptic to lanceolate, terete to moderately laterally compressed, often purplish, with 6-12 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.

usually pubescent;

lower glumes 5.5-8 mm, 1(3)-veined;

upper glumes 7-10 mm, 5-veined, often mucronate;

lemmas 8-13 mm, elliptic to lanceolate, rounded over the midvein, usually uniformly densely hairy, or the backs less densely so, apices acute to obtuse, entire;

awns 5-8 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 2.8-3.5(5) mm.

= 28.

= 14.