Flora of North America species comparison

4-55 cm, erect;

nodes pubescent.

to 200 cm, erect;

nodes glabrous.

glabrous or pubescent;

ligules 1-4 mm;

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

glabrous;

ligules 2-3 mm;

blades to 57 cm long, 2-3 cm wide, flat, glabrous below, appressed pubescent above.

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 60-100 racemosely arranged branches;

branches 1-13 cm, divergent to spreading, often arcuate;

branch axes 0.9-1.2 mm wide, winged, margins scabrous, long pubescent.

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

2-2.4 mm long, 0.9-1.2 mm wide, paired, divergent to spreading from the branch axes, elliptic to ovate, glabrous or pubescent, stramineous, sometimes partially purple.

absent;

upper glumes and lower lemmas veinless;

upper florets white.

absent;

upper glumes smooth, 3-veined, margins entire, sparsely short-pubescent, at least distally;

lower lemmas smooth, lacking ribs over the veins, 3-veined, margins entire, glabrous or shortly pubescent;

upper florets stramineous to white.

0.8-0.9 mm, translucent, white.

1.5-1.7 mm, golden brown.

= 20.

= 20, 40.