Flora of North America species comparison

50-220 cm, erect;

nodes glabrous or pubescent.

10-50 cm, erect.

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 0.5-2 mm;

blades to 20 cm long, 1.5-3.8 mm wide, flat, pubescent.

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, usually composed of a digitate pair of branches, 1-5 additional branches sometimes present below;

branches 1.8-7.1 cm, diverging to erect;

branch axes 0.8-1.3 mm wide, winged, 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).

3-3.6 mm long, 1.3-1.8 mm wide, solitary (rarely paired), appressed to the branch axes, elliptic, glabrous, apices acute to acuminate.

1.2-1.7 mm, white.

glumes absent;

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

upper florets stramineous.

glumes absent;

upper glumes and lower lemmas glabrous, 5-veined, margins flat;

upper florets stramineous to golden brown.

= 40.

= 12, 24, 36.