Flora of North America species comparison

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

50-110(145) cm, erect to spreading;

nodes (3)4-5(6), usually glabrous, sometimes pubescent;

internodes usually 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(25) cm, open, nodding;

branches ascending to spreading or drooping, filiform.

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(40) mm, elliptic to lanceolate, terete to moderately laterally compressed, with (4)6-10(15) 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.

usually glabrous, sometimes pubescent;

lower glumes 7.5-12.5 mm, 1(3)-veined;

upper glumes 8.9-11.3 mm, 3-veined, often mucronate;

lemmas 9-14(16) mm, elliptic, rounded over the midvein, margins more or less densely pilose on the lower 1/2 or 3/4, lower lemmas in a spikelet glabrous across the backs, uppermost lemmas with appressed hairs on the backs, apices obtuse, entire;

awns (2)3-5 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 1.6-2.7 mm.

sheaths often retrorsely pilose;

culm sheaths glabrous, often tufted-pilose near the auricle position, midrib of the culm leaves not abruptly narrowed just below the collar;

auricles absent;

ligules 0.4-2 mm, glabrous, rounded, erose, ciliolate;

blades 10-35 cm long, 3-12 mm wide, flat, glabrous.

= 14.

= 28.