Flora of North America species comparison

50-220 cm, erect;

nodes glabrous or pubescent.

4-55 cm, erect;

nodes pubescent.

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 pubescent;

ligules 1-4 mm;

blades 10-40 cm long, 8-22 mm wide, flat, glabrous or sparsely 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, with (7)20-70 racemosely arranged branches;

branches 1.2-9.5 cm, diverging to spreading, occasionally arcuate, disarticulating at maturity;

branch axes 0.7-1.5 mm wide, broadly winged, glabrous, margins scabrous, extending beyond the distal 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).

1.1-1.9 mm long, 0.5-0.8 mm wide, solitary, appressed to the branch axes, elliptic, pubescent, white.

1.2-1.7 mm, white.

0.8-0.9 mm, translucent, white.

glumes absent;

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

upper florets stramineous.

glumes absent;

upper glumes and lower lemmas veinless;

upper florets white.

= 40.

= 20.