Flora of North America species comparison

4-55 cm, erect;

nodes pubescent.

50-120 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 2-5 mm;

blades to 21 cm long, 2-5 mm wide, flat, glabrous, pubescent behind the ligules, margins ciliate basally.

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 4-9 racemosely arranged branches;

branches 2-6.5 cm, divergent to erect, terminating in a spikelet;

branch axes 1.2-1.5 mm wide, winged, glabrous, margins scabrous.

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

2.8-3 mm long, 1.5-1.6 mm wide, paired, imbricate, appressed to divergent from the branch axes, elliptic, stramineous.

absent;

upper glumes and lower lemmas veinless;

upper florets white.

absent;

upper glumes and lower lemmas abundantly pubescent, hairs longer than 0.1 mm, 3-veined, margins entire;

lower lemmas lacking ribs over the veins;

upper florets 2.5-2.7 mm, white to stramineous.

0.8-0.9 mm, translucent, white.

= 20.

= 60.