Flora of North America species comparison

4-55 cm, erect;

nodes pubescent.

80-110 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, sparsely pubescent apically;

ligules 1-2.9 mm;

blades to 62 cm long, 3-7 mm wide, mostly involute, pubescent above, glabrous below.

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 3-15 racemosely arranged branches;

branches 5.2-12.5 cm, divergent to spreading, terminating in a spikelet;

branch axes 0.3-0.8 mm wide, very narrowly winged, scabrous.

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

2.2-2.5 mm long, 1-1.3 mm wide, paired, appressed to the branch axes, elliptic to obovate, white to light stramineous.

absent;

upper glumes and lower lemmas veinless;

upper florets white.

absent;

upper glumes glabrous, 5-veined;

lower lemmas glabrous, 3-veined;

upper florets 1.4-2 mm, white to stramineous.

0.8-0.9 mm, translucent, white.

1-1.6 mm, suborbicular, brown.

= 20.

= unknown.