Flora of North America species comparison

60-170 cm, erect;

nodes (5)6-8, pubescent;

internodes usually glabrous, sometimes pubescent near the nodes.

34-70 cm, erect or ascending, glabrous or puberulent below the panicle.

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.

densely short-pubescent or glabrous;

auricles absent;

ligules 1.5-2 mm, glabrous, obtuse, erose;

blades 4-20 cm long, 1-5 mm wide, flat, both surfaces pubescent or glabrous.

10-25 cm, open, nodding;

branches ascending, spreading, or drooping.

3-15 cm long, 2-6 cm wide, open, erect;

branches (at least some) 1-3+ cm, ascending to spreading, never drooping, usually visible, with 1 or 2 spikelets.

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

30-50 mm, longer than the panicle branches, not densely crowded, with parallel sides or widening distally, moderately laterally compressed, with 6-10 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.

pilose, margins hyaline;

lower glumes 5-10 mm, 1-veined;

upper glumes 10-15 mm, 3-veined;

lemmas 12-20 mm, linear-lanceolate, often arcuate, pubescent, with longer hairs near the margins, 5-7-veined, rounded over the midvein, margins hyaline, apices acuminate, teeth 1.5-3 mm;

awns 12-23 mm, straight or arcuate, arising 1.5 mm or more below the lemma apices;

anthers 0.5-1 mm.

= 28.

= 28.