Flora of North America species comparison

65-120(150) cm, erect;

nodes (3)5-7(9), usually pubescent, sometimes glabrous;

internodes pubescent or glabrous.

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.

retrorsely pilose, midrib of the culm leaves not abruptly narrowed just below the collar, collars hairy or glabrous;

auricles absent;

ligules 0.5-2 mm, glabrous, obtuse to truncate, erose;

blades 12-32 cm long, 6-15(19) mm wide, flat, 1 or both surfaces glabrous or hairy.

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, usually nodding;

branches usually spreading, sometimes ascending, often drooping.

10-20 cm, open, nodding;

branches ascending to spreading, often drooping.

(13)15-30 mm, elliptic to lanceolate, terete to moderately laterally compressed, with (4)5-10(13) florets.

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

usually pubescent, rarely glabrous;

lower glumes 4-8 mm, 1-veined;

upper glumes 5-10 mm, 3(5)-veined, not mucronate;

lemmas 8-12 mm, lanceolate, rounded over the midvein, backs and margins usually hairy, sometimes glabrous or scabrous, apices subulate to acute, entire;

awns (3)4-7(8) mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 2-4(5) 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.

= 14.

= 14.