Flora of North America species comparison

30-110 cm, stout, erect;

nodes glabrous.

3-60 cm, erect;

nodes glabrous.

glabrous;

ligules 2-3 mm;

blades to 35 cm long, 2-5.4 mm wide, conduplicate (rarely flat).

glabrous or pubescent;

ligules 0.2-0.7 mm;

blades 8-18 cm long, 2-7.1 mm wide, flat, glabrous or pubescent.

terminal, with 2-7 racemosely arranged branches;

branches 1.6-7.1 cm, usually divergent, rarely merely ascending;

branch axes 0.6-1.1 mm wide, glabrous, terminating in a spikelet.

terminal, usually composed of a digitate pair of branches, a third branch sometimes present below the terminal pair;

branches 1.8-6.4 cm, diverging to erect;

branch axes 0.5-1.3 mm wide, narrowly winged, glabrous, margins scabrous, terminating in a spikelet.

2.5-3 mm long, 1.5-2.2 mm wide, paired, appressed to the branch axes, elliptic-ovate, light to dark brown.

1.9-2.3 mm long, 1.2-2 mm wide, solitary, appressed to the branch axes, broadly elliptic to ovate to obovate, glabrous, stramineous, apices obtuse.

absent;

upper glumes usually with short, appressed pubescence, rarely glabrous, 5-veined, margins entire;

lower lemmas with short, appressed pubescence or glabrous, 3-veined, margins entire;

upper florets dark glossy brown.

absent;

upper glumes 3-veined, lower lemmas faintly 3-veined;

upper florets stramineous.

1.4-1.6 mm, brown.

1.8-2.2 mm, white.

= 20, 40, 60.

= 20, 40, 50.