Flora of North America species comparison

4-55 cm, erect;

nodes pubescent.

40-120 cm, erect;

nodes glabrous or pubescent.

glabrous or pubescent;

ligules 1-4 mm;

blades 10-40 cm long, 8-22 mm wide, flat, glabrous or sparsely pubescent.

glabrous or pubescent;

ligules 1.5-3.8 mm;

blades to 37 cm long, 2-9.3 mm wide, flat, glabrous or pubescent.

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.

terminal, with 1-6 racemosely arranged branches;

branches 2-10.9 cm, diverging to spreading (rarely erect), persistent;

branch axes 0.6-1.3 mm wide, glabrous, margins scabrous, terminating in a spikelet.

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

2.3-3.3 mm long, 2-2.7 mm wide, solitary, appressed to the branch axes, elliptic to obovate or nearly orbicular, glabrous, stramineous.

absent;

upper glumes and lower lemmas veinless;

upper florets white.

absent;

upper glumes 3-veined, lower lemmas 5-veined;

upper florets pale to stramineous.

0.8-0.9 mm, translucent, white.

about 2 mm, white to yellow-brown.

= 20.

= 20, 58, 70, 80.