Flora of North America species comparison

5-90 cm, erect, slender, puberulent below the panicle.

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

usually densely and softly retrorsely pubescent to pilose, upper sheaths sometimes glabrous;

auricles absent;

ligules 2-3 mm, glabrous, obtuse, lacerate;

blades to 16 cm long, 1-6 mm wide, both surfaces softly hairy.

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.

5-20 cm long, 3-8 cm wide, open, lax, drooping distally, usually 1-sided;

branches 1-4 cm, drooping, usually 1-sided and longer than the spikelets, usually at least 1 branch with 4-8 spikelets.

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

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

10-20 mm, usually shorter than the panicle branches, sides parallel or diverging distally, moderately laterally compressed, often purplish-tinged, not densely crowded, with 4-8 florets.

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

villous, pubescent, or glabrous, margins hyaline;

lower glumes 4-9 mm, 1-veined;

upper glumes 7-13 mm, 3-5-veined;

lemmas 9-12 mm, lanceolate, glabrous or pubescent to pilose, 5-7-veined, rounded over the midvein, margins hyaline, often with some hairs longer than those on the backs, apices acuminate, hyaline, bifid, teeth 0.8-2(3) mm;

awns 10-18 mm, straight, arising 1.5 mm or more below the lemma apices;

anthers 0.5-1 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.

= 14.

= 14,28.