Flora of North America species comparison

60-170 cm, erect;

nodes (5)6-8, pubescent;

internodes usually glabrous, sometimes pubescent near the nodes.

50-135 cm, erect or ascending, sometimes geniculate, usually single or few together, sometimes clumped;

nodes 2-7, pubescent or glabrous;

internodes glabrous or pubescent.

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.

pilose, villous, or glabrous;

auricles sometimes present on the lower leaves;

ligules to 4 mm, glabrous, truncate or obtuse, erose;

blades 7-30 cm long, 2.5-8.5(9) mm wide, flat, pubescent or glabrous on both surfaces, sometimes only the adaxial surface pubescent.

10-25 cm, open, nodding;

branches ascending, spreading, or drooping.

10-24 cm, open or contracted, erect or nodding;

branches erect to spreading.

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

16-32(45) mm, elliptic to lanceolate, terete to moderately laterally compressed, sometimes purplish, with 4-14 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 or hairy;

lower glumes (4)5-10 mm, 1(3)-veined;

upper glumes (5)7.5-13 mm, 3-veined;

lemmas 9-16 mm, lanceolate, rounded over the midvein, sparsely to densely hairy throughout, or on the margins and lower portion of the back, or along the marginal veins and keel, apices subulate to acute, entire or slightly emarginate, lobes shorter than 1 mm;

awns usually present, sometimes absent, to 7.5 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 3.5-7 mm.

= 28.

= 28, 56.