Flora of North America species comparison

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

20-60 cm, erect or geniculately ascending.

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.

7-20 cm long, 4-8 cm wide, racemose, open, nodding, often with few spikelets, usually secund;

branches sometimes longer than the spikelets, ascending-spreading, flexuous, slightly curved, usually with 1 spikelet.

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.

15-70 mm, broadly oblong or ovate-lanceolate, terete to moderately laterally compressed;

florets 8-30, bases concealed at maturity;

rachilla internodes concealed at maturity.

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;

lower glumes 4.5-7 mm, 3-5(7)-veined;

upper glumes 6-8 mm, 7-veined;

lemmas 8-11 mm long, 2-2.4 mm wide, lanceolate, chartaceous, smooth or scabridulous, 7-9-veined, rounded over the midvein, margins hyaline, 0.6-0.9 mm wide, strongly angled above the middle, not inrolled at maturity, apices acute, bifid, teeth shorter than 1 mm;

awns 8-10 mm, flattened and sometimes twisted at the base, divaricate at maturity, arising 1.5 mm or more below the lemma apices;

anthers 1-1.3 mm.

equaling the paleas, thin, weakly inrolled or flat.

sheaths densely pilose;

ligules 1-1.5 mm, hairy, obtuse, erose, ciliolate;

blades 5-15 cm long, 4-6 mm wide, densely pilose on both surfaces.

= 14.

= 14.