Flora of North America species comparison

4-55 cm, erect;

nodes pubescent.

100-200 cm, stout, 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 1.9-2.2 mm, brown;

blades 30-90 cm long, 1-3 cm wide, flat, glabrous, pubescent behind the ligules.

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 10-20 racemosely arranged branches;

branches 3-15 cm, spreading to diverging;

branch axes 1-1.7 mm wide, winged, wings narrower than the central section, 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.

2.2-3.2 mm long, 1.8-2.4 mm wide, paired, appressed to or diverging from the branch axes, obovate, brown.

absent;

upper glumes and lower lemmas veinless;

upper florets white.

absent;

upper glumes and lower lemmas glabrous or variously short pubescent, 5-veined, margins entire;

upper florets 2.5-2.7 mm, brown.

0.8-0.9 mm, translucent, white.

= 20.

= 36, 40, 54, 80.