Flora of North America species comparison

60-120 cm, erect or spreading;

nodes (3)4-6(7), usually pilose;

internodes glabrous.

40-90 cm, erect;

nodes 3-5(7), mainly pubescent;

internodes mostly glabrous, puberulent near the nodes.

pilose or glabrous;

auricles absent;

ligules 2-6 mm, glabrous, obtuse or truncate, erose or lacerate;

blades 13-25(33) cm long, to 14 mm wide, flat, abaxial surfaces usually glabrous, sometimes pilose, adaxial surfaces usually pilose, sometimes glabrous.

10-15 cm, open;

branches ascending to drooping.

10-25 cm, open, nodding;

branches ascending to spreading.

15-30 mm, elliptic to lanceolate, terete to moderately laterally compressed, with (3)4-9 florets.

10-30 mm, elliptic to lanceolate, terete to moderately laterally compressed, with 7-12(16) florets.

glabrous or pilose;

lower glumes 5-8 mm, 1(3)-veined;

upper glumes 8-12 mm, 3-veined;

lemmas 8-15 mm, lanceolate, rounded over the midvein, backs sparsely hairy or glabrous, margins usually coarsely pubescent, sometimes glabrous, apices subulate to acute, entire;

awns (4)6-12 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 2-4 mm.

usually glabrous, sometimes pubescent;

lower glumes 5-6.5(7) mm, 1(3)-veined;

upper glumes (6)7-9 mm, 3-veined, not mucronate;

lemmas 8-11 mm, elliptic, rounded over the midvein, backs and margins pubescent, sometimes nearly glabrous, apices truncate or obtuse, entire, rarely emarginate, lobes shorter than 1 mm;

awns 2-4 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 1.8-4 mm.

sheaths densely pilose or glabrous;

upper sheaths glabrous or almost so, midrib of the culm leaves not abruptly narrowed just below the collar;

auricles absent;

ligules 1-2 mm, glabrous, truncate or obtuse, sometimes lacerate;

blades 5-20 cm long, to 7 mm wide, flat, both surfaces glabrous, sometimes scabrous.

= 14.

= 28.