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.

30-75 cm, nearly erect, stiff, slightly fleshy or thickened;

nodes glabrous, often with a constricted, yellowish ring;

internodes glabrous;

fall phase with few, long, suberect branches, sparingly rebranched, branches arising mostly from near the base.

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.

4-7;

sheaths shorter than the internodes, mostly glabrous, margins ciliate;

ligules 0.2-0.5 mm;

blades 5-10 cm long, 5-10 mm wide, stiffly ascending, thick, glabrous, veins evident, bases cordate, with papillose-based cilia, margins whitish, cartilaginous.

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

1-1.4 mm, broadly obovoid-spherical, puberulent to subglabrous.

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.

0.2-0.4 mm, acute, upper florets 0.8-1.1 mm, broadly ellipsoid, minutely umbonate.

rosettes well-differentiated;

sheaths pubescent;

blades ovate to lanceolate.

rosettes well-differentiated;

blades numerous, to 15 cm, lowest blades ovate, upper blades lanceolate, grading into the cauline blades.

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

panicles 5-14 cm, 1/2 - 2/3 as wide as long, exserted.

= 36.

= unknown.