Flora of North America species comparison

50-220 cm, erect;

nodes glabrous or pubescent.

15-96 cm, erect or prostrate, often rooting at the lower nodes;

nodes glabrous.

glabrous or pubescent;

ligules 1-4(7.7) mm;

blades 12-60 cm long, 2-12 mm wide, flat, mostly glabrous, a few long hairs near the base of the adaxial surface.

glabrous;

ligules 1-3.2 mm;

blades to 56 cm long, 2.2-15 mm wide, flat.

terminal, with (4)10-30 racemosely arranged branches;

branches 1.2-11.5 cm, divergent;

branch axes 0.5-1.1 mm wide, winged, glabrous, margins scabrous, terminating in a spikelet.

terminal, with 1-10(28) racemosely arranged branches;

branches 1.2-8.2 cm, diverging;

branch axes 0.7-2.3 mm wide, glabrous, broadly winged, wings about as wide as the central portion, margins scabrous, terminating in a spikelet.

1.8-2.8 mm long, 1.1-1.5 mm wide, paired, appressed to the branch axes, elliptic to slightly obovate, stramineous (rarely purple).

2-2.2 mm long, 1.3-1.8 mm wide, paired, appressed to the branch axes, glabrous, broadly elliptic, obovate, or orbicular, light to dark brown.

1.2-1.7 mm, white.

1.4-1.6 mm, white.

glumes absent;

upper glumes and lower lemmas 3-veined, margins pilose;

upper florets stramineous.

glumes absent;

upper glumes glabrous, 5-veined, margins entire;

lower lemmas glabrous, 3-5-veined, margins entire;

upper florets dark glossy brown.

= 40.

= 40.