Flora of North America species comparison

60-170 cm, erect;

nodes (5)6-8, pubescent;

internodes usually glabrous, sometimes pubescent near the nodes.

60-120 cm, erect or spreading;

nodes 4-6, pubescent or puberulent;

internodes mostly glabrous, sometimes pubescent to puberulent 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.

glabrous or pilose, often pilose near the auricles;

auricles usually present on the lower leaves, rarely absent;

ligules to 1.5 mm, usually pubescent, sometimes glabrous, truncate to obtuse, laciniate, ciliolate;

blades 10-25 cm long, 3-9 mm wide, flat, glabrous, pilose on the margins or throughout.

10-25 cm, open, nodding;

branches ascending, spreading, or drooping.

10-20 cm, open, usually nodding;

branches ascending to spreading or reflexed.

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

15-35 mm, elliptic to lanceolate, terete to moderately laterally compressed, with 4-10 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 pubescent, rarely glabrous, sometimes scabrous, margins often bronze-tinged;

lower glumes 4-7 mm, 3-veined;

upper glumes 6.5-9 mm, (3)5-veined;

lemmas 10-13 mm, elliptic to lanceolate, rounded over the midvein, backs usually pubescent, sometimes glabrous distally, margins often bronze-tinged, pubescent nearly throughout, apices acute to obtuse, entire, rarely slightly emarginate, lobes shorter than 1 mm;

awns 3-5 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 3.5-5 mm.

= 28.

= 14.