Flora of North America species comparison

30-100 cm, erect;

nodes (2)3-4(5), glabrous or pubescent;

internodes mostly glabrous, puberulent near the nodes.

80-110 cm, erect.

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

auricles absent;

ligules to 2.5 mm, glabrous, truncate or obtuse, erose or lacerate;

blades (3)10-25(35) cm long, 2-5(6) mm wide, flat, not glaucous, both surfaces usually glabrous, sometimes the adaxial surface pilose.

7-20 cm, open, nodding, often 1-sided;

branches slender, ascending to spreading, often recurved and flexuous.

11-30 cm long, 4-20 cm wide, open, erect or nodding;

branches usually longer than the spikelets, ascending to widely spreading, slender, slightly curved or straight.

12-38 mm, elliptic to lanceolate, terete to moderately laterally compressed, with (3)5-11(13) florets.

10-25 mm, lanceolate, terete to moderately laterally compressed, often purple-tinged;

florets 4-10, bases concealed or visible at maturity;

rachilla internodes concealed or visible at maturity.

usually pubescent, rarely glabrous;

lower glumes 5-7(9) mm, usually 3-veined, sometimes 1-veined;

upper glumes 6-10 mm, 3-veined, not mucronate;

lemmas 8-14 mm, elliptic, rounded over the midvein, usually pubescent or pilose, margins often with longer hairs, backs and margins rarely glabrous, apices acute or obtuse to truncate, entire;

awns (1)2-3(3.5) mm, straight, arising less than 1.5 mm below the lemma apices;

anthers (1)2-3 mm.

glabrous;

lower glumes 4-6 mm, 3-veined;

upper glumes 5-8 mm, 5-veined;

lemmas 7-9 mm long, 1.1-1.5 mm wide, lanceolate, obscurely 7-veined, rounded over the midvein, glabrous, coriaceous, margins slightly angled, inrolled or not at maturity, apices acute, bifid, teeth shorter than 1 mm;

awns 6-11 mm, straight, arising at varying distances below the lemma apices;

anthers 2.5-5 mm.

shorter than the paleas, weakly to strongly inrolled.

sheaths with dense, soft, appressed hairs;

ligules 1-1.5 mm, hairy, obtuse, erose;

blades 10-20 cm long, 2-6 mm wide, coarsely pilose on both surfaces.

= 14.

= 14.