Flora of North America species comparison

60-170 cm, erect;

nodes (5)6-8, pubescent;

internodes usually glabrous, sometimes pubescent near the nodes.

5-60 cm, erect.

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;

ligules 0.5-1 mm, hairy, obtuse;

blades 3-13 cm long, 2-4 mm wide.

10-25 cm, open, nodding;

branches ascending, spreading, or drooping.

2-10 cm long, 1.5-3 cm wide, erect, contracted or loose;

branches shorter than the spikelets, ascending, slightly curved or straight.

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

6-15 mm, lanceolate, shiny, terete to moderately laterally compressed;

florets 5-12, bases concealed at maturity;

rachilla internodes concealed at maturity.

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;

lower glumes 4-4.6 mm, 3-5-veined;

upper glumes 5.2-5.4 mm, 7-veined;

lemmas 4.5-6.5 mm long, 1.5-1.7 mm wide, elliptic, glabrous, distinctly 7-veined, rounded over the midvein, margins broadly hyaline, sharply angled, not inrolled at maturity, apices notched, notch at least 0.6 mm deep;

awns 2-6 mm, straight, arising from the base of the apical notch but less than 1.5 mm below the lemma apices;

anthers 0.5-2 mm.

longer than the paleas, thin, weakly inrolled or flat.

= 28.

= 28.