Flora of North America species comparison

20-110 cm, erect;

nodes glabrous.

10-150 cm, erect or decumbent;

nodes glabrous.

glabrous or pubescent;

ligules 0.2-0.5 mm;

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

glabrous;

ligules 0.3-1.2 mm, often with a row of hairs behind them;

blades 5-30 cm long, 2-8(12) mm wide, flat, usually glabrous.

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.

terminal, with 1-5 digitately or racemosely arranged branches;

branches 3-10 cm, diverging to spreading, persistent;

branch axes 1.5-3 mm wide, broadly winged, glabrous, margins scabrous, terminating in a spikelet.

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.

1.8-3.2 mm long, 2-2.3 mm wide, solitary, diverging from the branch axes, ovate, glabrous, olive green to dark, glossy brown.

2-3 mm, white.

1.1-1.5 mm, nearly orbicular.

glumes absent;

upper glumes glabrous, 5-veined;

lower lemmas 5-veined, margins inrolled;

upper florets light yellow to white.

glumes absent;

upper glumes as long as the lower lemmas, 5-7-veined;

lower lemmas 3-5-veined;

upper florets 2.5-3 mm long, 1.4-1.8 mm wide, dark glossy brown.

= 20, 30, 40.

= 20, 40, 60, 120.