Flora of North America species comparison

60-170 cm, erect;

nodes (5)6-8, pubescent;

internodes usually glabrous, sometimes pubescent near the nodes.

35-100 cm, erect or geniculate near the base, glabrous.

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 pubescent;

auricles absent;

ligules 2-2.5 mm, glabrous, acute, lacerate;

blades 4-20 cm long, 1-6 mm wide, pubescent on both surfaces.

10-25 cm, open, nodding;

branches ascending, spreading, or drooping.

10-20 cm long, 5-12 cm wide, open;

branches 2-10 cm, spreading, ascending or drooping, rarely with more than 3 spikelets.

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

20-35 mm, usually shorter than the panicle branches, sides parallel or diverging distally, moderately laterally compressed, with 5-9 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.

smooth or scabrous, margins hyaline;

lower glumes 6-14 mm, 1(3)-veined;

upper glumes 10-20 mm, 3(5)-veined;

lemmas 14-20 mm, narrowly lanceolate, pubescent or puberulent, 7(9)-veined, rounded over the midvein, margins hyaline, apices acuminate, bifid, teeth 1-3 mm;

awns 15-30 mm, straight, arising 1.5 mm or more below the lemma apices;

anthers 1-1.4 mm.

= 28.

= 14,28.