Flora of North America species comparison

5-65 cm, erect;

nodes glabrous.

3-60 cm, erect;

nodes glabrous.

glabrous, sparsely long pubescent distally;

ligules 1-2 mm;

blades to 14 cm long, 1.8-11.5 mm wide, flat or conduplicate, glabrous or pubescent, apices involute.

glabrous or pubescent;

ligules 0.2-0.7 mm;

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

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

branches 1.4-7 cm, diverging, often arcuate;

branch axes 1.2-2.2 mm wide, winged, glabrous, margins scabrous, 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.

2.4-3.2 mm long, 1.1-1.6 mm wide, solitary (rarely paired), appressed to the branch axes, broadly elliptic, stramineous, sometimes partially purple.

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 or, if present, to 1 mm and triangular;

upper glumes sparsely and shortly pubescent on the back, 3-veined;

lower lemmas glabrous, 3-veined;

upper florets stramineous.

absent;

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

upper florets stramineous.

1.9-2.1 mm, yellow.

1.8-2.2 mm, white.

= 20, 30, 40, 48, 60, 61.

= 20, 40, 50.