Flora of North America species comparison

40-90 cm tall, 1-2(3) mm thick, erect, glabrous;

nodes usually 3.

40-100 cm tall, 0.8-3(4.8) thick, erect, glabrous;

nodes usually 3.

10-25 cm long, 1-4 cm wide, bases sometimes included in the upper leaf sheaths;

branches ascending to spreading, longest lower branches 4-12 cm.

10-45 cm long, 2-8 cm wide, bases sometimes included in the upper leaf sheaths;

branches ascending to spreading, longest lower branches 4-12 cm.

subequal, 6-8 mm, linear-lanceolate, 1-3-veined, midveins smooth, scabridulous, or with stiff hairs, varying within a panicle, apices acuminate;

florets 4-5.5 mm long, about 0.8 mm thick, fusiform;

calluses 0.4-0.5 mm, blunt, strigose, hairs 0.5-0.8 mm;

lemmas pubescent over and between the veins on the proximal 1/2 at least initially, hairs 0.5-0.8 mm, sometimes glabrous at maturity between the midveins and lateral veins, distal portion glabrous, tapering to the apices, apices with 0.7-1 mm hairs around the base of the awn;

awns 10-18 mm, glabrous or scabrous, usually once-geniculate;

paleas 3/4 - 9/10 as long as the lemmas, pubescent over the central portion, apices involute;

lodicules 3;

anthers 2-2.4(3) mm, penicillate.

subequal, 5-11 mm, linear-lanceolate, 3-veined, midveins smooth, scabrous, or with stiff hairs, varying within a panicle, apices acuminate;

florets 3.5-5(7) mm long, about 0.8 mm thick, fusiform;

calluses 0.5-1 mm, blunt, strigose, hairs 0.5-0.8 mm;

lemmas hairy over the veins, hairs 0.5-0.8 mm, glabrous between the mid- and lateral veins, glabrous or hairy between the lateral and marginal veins, distal portion glabrous, tapering to the apices, apices with 0.7-1 mm hairs around the base of the awn;

awns 12-25 mm, glabrous or scabrous, once- or twice-geniculate;

paleas 3.5-6.5 mm, 3/4 - 9/10 as long as the lemmas, pubescent over the central portion, apices involute;

lodicules 3;

anthers 2-4 mm in chasmogamous florets, cleistogamous florets sometimes with anthers of 2 lengths, about 0.4 mm and 0.7 mm, or all anthers of the same length, the long anthers penicillate.

2-3 mm long, 0.9-1 mm thick, fusiform;

style bases straight, centric.

about 3 mm long, 1-1.4 mm thick;

style bases inclined, eccentric.

sheaths mostly glabrous, margins ciliate distally;

collars glabrous, often with tufts of hair to 1.5 mm on the sides;

ligules 0.2-0.6 mm, membranous, strigose, ciliate, cilia to 2 mm, slightly longer at the leaf margins;

blades 8-35 cm long, usually convolute and 0.5-0.8 mm in diameter, 2-3 mm wide when flat, erect, abaxial surfaces smooth, adaxial surfaces usually glabrous.

sheaths mostly glabrous, margins ciliate distally;

collars glabrous, often with tufts of hair to 1.5 mm on the margins;

ligules 0.2-0.6 mm, membranous, ciliate, cilia 1-2 mm, longest at the margins;

blades 25-70 cm long, 2-7 mm wide when flat, usually convolute and 0.4-0.8 mm in diameter, erect, abaxial surfaces smooth, adaxial surfaces mostly glabrous.

= unknown.

= unknown.