Flora of North America species comparison

50-220 cm, erect;

nodes glabrous or pubescent.

100-200 cm, stout, erect;

nodes glabrous.

glabrous or pubescent;

ligules 1-4(7.7) mm;

blades 12-60 cm long, 2-12 mm wide, flat, mostly glabrous, a few long hairs near the base of the adaxial surface.

glabrous or sparsely pubescent;

ligules 1-2 mm, brown;

blades to 50 cm long, 7-18 mm wide, flat, glabrous or pubescent, margins scabrous, ciliate.

terminal, with (4)10-30 racemosely arranged branches;

branches 1.2-11.5 cm, divergent;

branch axes 0.5-1.1 mm wide, winged, glabrous, margins scabrous, terminating in a spikelet.

terminal, with 4-13 racemosely arranged branches;

branches 6-11 cm, diverging, divaricate, or reflexed;

branch axes 0.5-1(1.2) mm wide, winged, wings narrower than the central section, terminating in a spikelet.

1.8-2.8 mm long, 1.1-1.5 mm wide, paired, appressed to the branch axes, elliptic to slightly obovate, stramineous (rarely purple).

2-2.7(3) mm long, 1.1-1.8 mm wide, paired, appressed to or diverging from the branch axes, elliptic to obovate, pubescent, brown.

1.2-1.7 mm, white.

glumes absent;

upper glumes and lower lemmas 3-veined, margins pilose;

upper florets stramineous.

glumes absent;

upper glumes densely short pubescent, hairs about 0.5 mm;

lower lemmas glabrous or sparsely short pubescent, margins entire;

upper florets 1.8-2.2 mm, pubescent, brown.

= 40.

= 40, 60.