Flora of North America species comparison

60-170 cm, erect;

nodes (5)6-8, pubescent;

internodes usually glabrous, sometimes pubescent near the nodes.

50-150 cm, erect or basally decumbent, often rooting from the lower nodes;

nodes 3-5(6), pubescent;

internodes usually glabrous, often puberulent-pubescent just below the nodes, rarely puberulent throughout.

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, sometimes slightly pubescent near the throat, sometimes with hairs in the auricular position;

auricles absent or vestigial on the basal leaves;

ligules 2-4.2 mm, glabrous, obtuse, lacerate;

blades 13-26 cm long, 4-10 mm wide, light green or glaucous, flat, glabrous, sometimes scabrous on both surfaces.

10-25 cm, open, nodding;

branches ascending, spreading, or drooping.

10-20 cm, open, nodding;

branches ascending to spreading, often drooping.

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

23-35 mm, elliptic to lanceolate, terete to moderately laterally compressed, with 5-11 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.

glabrous, sometimes scabrous, margins often bronze-tinged;

lower glumes 6-9 mm, 3-veined;

upper glumes 8-12 mm, 5-veined;

lemmas 12-16 mm, elliptic to lanceolate, rounded over the midvein, backs sparsely pilose, pubescent, or scabrous, margins densely pilose, at least on the lower 1/2, often bronze-tinged, apices acute to obtuse, entire, rarely slightly emarginate, lobes shorter than 1 mm;

awns 4-6 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 3.5-5 mm.

= 28.

= 14.