Flora of North America species comparison

30-60 cm, slender.

20-60 cm, erect or geniculately ascending.

pilose-pubescent to nearly glabrous;

blades 7-28 cm long, 2-9 mm wide, pilose or glabrous.

10-20 cm long, 3-9 cm wide, erect, dense;

branches appressed to spreading, sometimes flexuous.

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.

15-20 mm, elliptic to lanceolate, more or less terete, with 3-9 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.

glabrous, acuminate;

lower glumes 8-10 mm, 1-veined;

upper glumes 12-16 mm, 3(5)-veined;

lemmas 11-14 mm, lanceolate to linear-lanceolate, sparsely pubescent, 5-veined, rounded over the midvein, apices acuminate, bifid, teeth 2-3 mm, usually aristate, sometimes acuminate;

awns 13-20 mm, geniculate, strongly to moderately twisted in the basal portion, arising 1.5 mm or more below the lemma apices;

anthers 2-2.5 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.

= unknown.

= 14.