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.

20-40 cm, erect to ascending.

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.

densely retorsely pilose;

ligules 1.5-2.5 mm, glabrous or pilose, obtuse, lacerate;

blades 7-8 cm long, 3-6 mm wide, pilose on both surfaces.

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

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

(4)10-15 cm long, 4-7 cm wide, open, nodding;

branches sometimes longer than the spikelets, spreading or ascending, sinuous.

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

10-20 mm, lanceolate, terete to moderately laterally compressed;

florets 5-9(11), bases concealed at maturity;

rachilla internodes concealed 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.

densely pilose;

lower glumes 7-10 mm, 3-veined;

upper glumes 8-12 mm, (5)7-veined;

lemmas 9-11(13) mm long, 1-1.8 mm wide, lanceolate, densely pilose, distinctly 7-veined, rounded over the midvein, margins rounded, not inrolled at maturity, apices acute, bifid, teeth shorter than 1 mm;

awns 10-16 mm, straight to weakly spreading, arising 1.5 mm or more below the lemma apices;

anthers 0.7-1 mm.

equaling or shorter than the paleas, thin, weakly inrolled.

= 14.

= unknown.