Flora of North America species comparison

4-55 cm, erect;

nodes pubescent.

60-140 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.

pubescent;

ligules 2-4 mm;

blades to 37 cm long, 2.2-11 mm wide, flat.

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 2-5 racemosely arranged branches;

branches 3.7-13 cm, divergent to erect;

branch axes 0.2-0.8 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.

3.1-4 mm long, 2-2.5 mm wide, paired, not imbricate, appressed to the branch axes, elliptic to obovate, yellow-brown.

absent;

upper glumes and lower lemmas veinless;

upper florets white.

present or absent;

upper glumes glabrous or sparsely pubescent basally, (6)7-veined, margins entire;

lower lemmas glabrous or sparsely pubescent basally, lacking ribs over the veins, 5-veined, margins entire;

upper florets white.

0.8-0.9 mm, translucent, white.

2.6-2.9 mm, purple.

= 20.

= unknown.