Flora of North America species comparison

4-55 cm, erect;

nodes pubescent.

20-110 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 or pubescent;

ligules 0.2-0.5 mm;

blades 5-31 cm long, 2-10 mm wide, flat or conduplicate, glabrous or pubescent.

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, usually composed of a digitate pair of branches, 1-3 additional branches sometimes present below the terminal pair;

branches 3-15 cm, diverging to erect;

branch axes 0.7-1.8 mm wide, narrowly winged, glabrous, margins scabrous, terminating in a spikelet, distal spikelets sometimes reduced.

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

2.5-4 mm long, 2-2.8 mm wide, solitary, appressed to the branch axes, broadly elliptic to ovate or obovate, glabrous, light stramineous to white, apices obtuse to broadly acute.

absent;

upper glumes and lower lemmas veinless;

upper florets white.

absent;

upper glumes glabrous, 5-veined;

lower lemmas 5-veined, margins inrolled;

upper florets light yellow to white.

0.8-0.9 mm, translucent, white.

2-3 mm, white.

= 20.

= 20, 30, 40.