Flora of North America species comparison

7-80 cm;

nodes glabrous or pubescent.

(50)100-300 cm, to about 1 cm thick, sometimes branching above the base;

nodes glabrous.

keeled, strongly compressed, pubescent;

ligules 0.3-0.5 mm;

blades 3-20 mm wide, glabrous or sparsely pilose, midveins often white and prominent, apices frequently ciliate or pubescent.

primarily cauline;

sheaths often much wider than the internodes, mostly glabrous but the collars pubescent, lower sheaths compressed;

ligules 0.5-2.9 mm, ciliolate;

blades 15-50 cm long, (5)20-35 mm wide, bases usually wider than the sheaths.

terminal and axillary, 4-10 cm overall, rachises to 3.5 cm, with 2-5 branches;

branches 1-13 cm.

terminal and axillary, 10-50 cm overall, rachises 2-3.5 cm, with 30-100+ branches;

lower branches 10-24 cm, frequently fascicled.

2-3.5 mm, ovoid, ellipsoid, or lanceoloid, acuminate.

2.1-2.7 mm, ovoid to oblong-ellipsoid, acute or apiculate;

upper glumes and lower lemmas usually 5-veined, sparsely pilose;

upper florets 0-0.4 mm shorter than the upper glumes and lower lemmas, obtuse to subacute.

and lower lemmas extending beyond the upper florets, 2-5-veined, marginal veins pilose, apices acute to acuminate;

upper lemmas and paleas 1.5-1.8 mm, broadly ellipsoid.

1.2-1.5 mm, gray.

usually absent.

= 40, 60, 80.

= 20.