Flora of North America species comparison

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

nodes usually 3.

50-90 cm tall, 1-2.9 thick, erect, glabrous;

nodes usually 3.

mostly glabrous, margins ciliate distally;

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

ligules 0.5-1.5 mm, membranous, ciliate, cilia 1-2 mm, slightly longer at the leaf margins;

blades 10-50 cm long, usually tightly convolute and 0.4-1 mm in diameter, 2-4 mm wide when flat, erect, abaxial surfaces smooth, adaxial surfaces usually glabrous.

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.

10-20 cm long, 1-5 cm wide, bases sometimes included in the 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, 6.3-13 mm, linear-lanceolate, 3-veined, midveins smooth, scabrous, or with stiff hairs, varying within a panicle, apices acuminate;

florets 5.5-8 mm long, about 0.8-1.3 mm thick, fusiform;

calluses 0.3-0.6 mm, blunt, strigose, hairs 0.5-0.8 mm;

lemmas pubescent on the proximal 1/2, the pubescence over the midvein extending to the awn, hairs 0.5-0.8 mm, distal portion glabrous, tapering to the apices, apices with 0.7-1 mm hairs around the base of the awn;

awns 11-23 mm, glabrous or scabrous, usually 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 3-4 mm, 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 upright, centric.

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.

= unknown.

= unknown.