Flora of North America species comparison

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

45-120(150) cm, erect;

nodes (3)4-7(8), all pubescent or the lower nodes sometimes glabrous;

internodes 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.

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, open, nodding;

branches ascending, spreading, or drooping.

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.

15-25 mm, elliptic to lanceolate, terete to moderately laterally compressed, with 4-9 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.

glabrous;

lower glumes 5.5-7.5 mm, 1(3)-veined;

upper glumes 7.1-8.5 mm, 3-veined, not mucronate;

lemmas 9.5-14 mm, elliptic to lanceolate, rounded over the midvein, backs glabrous, sometimes scabrous, margins conspicuously hirsute on the lower 1/2 - 2/3, apices obtuse to acute, entire;

awns 3-5 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 1-1.4 mm.

sheaths usually retrorsely pilose, sometimes glabrous;

upper sheaths glabrous, throats glabrous or pilose, midrib of the culm leaves not abruptly narrowed just below the collar;

auricles sometimes present;

ligules 0.4-1.4 mm, usually glabrous, rarely pilose, truncate, erose;

blades 13-25 cm long, 4-10 mm wide, flat, abaxial surfaces usually glabrous, sometimes pilose, adaxial surfaces usually pilose, sometimes glabrous.

= 14.

= 14.