Flora of North America species comparison

50-220 cm, erect;

nodes glabrous or pubescent.

10-50 cm, decumbent;

nodes glabrous or pubescent.

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 2-2.5 mm;

blades to 12 cm long, 1.3-4.8 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 2-6 racemosely arranged branches;

branches 1.3-5.3 cm, diverging to erect, often arcuate, persistent;

branch axes 1.8-3 mm wide, broadly winged, usually conduplicate, glabrous, 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).

1.7-2.1 mm long, 1.1-1.4 mm wide, solitary, appressed to the branch axes, elliptic to ovate, glabrous, stramineous.

1.2-1.7 mm, white.

1-1.3 mm, white.

glumes absent;

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

upper florets stramineous.

glumes absent;

upper glumes and lower lemmas 5-veined;

upper florets stramineous, lemmas glabrous throughout.

= 40.

= 40, 60.