Flora of North America species comparison

50-140 cm, stout, pilose with papillose-based hairs to subglabrous;

fall phase branching from the mid- and upper culm nodes, with a few, nearly erect, elongate branches, sparsely rebranching, sheaths overlapping, concealing the secondary panicles;

nodes not swollen, glabrous or sparsely pubescent.

50-150 cm;

fall phase branching from the mid- and upper culm nodes, branches rebranching, often forming dense axillary fascicles, secondary panicles enclosed in the sheaths.

5-10;

sheaths not overlapping, striate-ribbed, narrowing above midlength, hispid to sparsely hirsute, hairs sometimes papillose-based, summits mottled with pale spots, margins ciliate, collars puberulent;

ligules 0.4-0.9 mm, membranous;

blades 10-25 cm long, 15-30 mm wide, flat, lanceolate, often rigid, glabrous or sparsely pubescent, with 9-13 major veins and 40-80 minor veins, bases cordate, with papillose-based cilia, apices acuminate.

5-14;

sheaths usually widest near midlength, narrowed to the summit, strongly papillose-hispid or softly pubescent and viscid, summits often mottled with white to yellowish blotches;

ligules membranous or of hairs.

2.4-3.6 mm long, 1.2-1.5 mm wide, narrowly ellipsoid, sparsely pubescent.

2.2-3.6 mm, ellipsoid to ovoid, with prominent veins, pointed.

1/3 – 1/2 as long as the spikelets, narrowly triangular;

upper glumes and lower florets slightly shorter than the spikelets, with 7 or 9 prominent veins;

lower florets sterile;

upper florets umbonate, apices with a minute tuft of hairs.

rosettes well-differentiated;

sheaths pubescent;

blades ovate to lanceolate.

rosettes well-differentiated;

blades 9-25 cm, ovate-lanceolate.

panicles 8-16 cm long, 4-12 mm wide, exserted, with many spikelets.

panicles exserted.

florets acute to acuminate, sometimes umbonate or apiculate, apices often with a minute tuft of hairs.

= 36.