Flora of North America species comparison

60-170 cm, erect;

nodes (5)6-8, pubescent;

internodes usually glabrous, sometimes pubescent near the nodes.

50-100 cm, erect to spreading;

nodes 3-5, usually glabrous, rarely pubescent;

internodes 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 glabrous, sometimes pubescent or pilose, especially the lower sheaths, midrib of the culm leaves usually narrowed just below the collar;

auricles absent;

ligules 1-3 mm, glabrous, truncate to obtuse, laciniate;

blades 10-20 cm long, 3-6 mm wide, flat, often glaucous, usually glabrous, sometimes scabrous, basal blades often pubescent.

10-25 cm, open, nodding;

branches ascending, spreading, or drooping.

10-20 cm, open;

branches ascending and spreading or declining and drooping.

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)5-10 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 glabrous, rarely slightly pubescent, 3-veined;

lower glumes 5.5-8 mm;

upper glumes 6.5-9 mm, often mucronate;

lemmas 8-12 mm, elliptic to lanceolate, rounded over the midvein, backs pubescent or glabrous, margins usually with longer hairs, apices subulate to obtuse, entire;

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

anthers 1.5-3.5 mm.

= 28.

= 14.