Flora of North America species comparison

20-110 cm, erect;

nodes glabrous.

10-70 cm, erect to ascending;

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, pubescent apically;

ligules 1.2-1.5 mm;

blades 6-20 cm long, 4-5 mm wide, flat to conduplicate, glabrous or pubescent.

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 2-5 racemosely arranged branches;

branches 1.4-5.2 cm, divergent;

branch axes about 0.8 mm wide, glabrous, 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.

2.3-2.7 mm long, 1.4-1.8 mm wide, paired, appressed to or divergent from the branch axes, elliptic, dark brown.

2-3 mm, white.

about 1.8 mm long, 1.4 mm wide, ellipsoidal.

glumes absent;

upper glumes glabrous, 5-veined;

lower lemmas 5-veined, margins inrolled;

upper florets light yellow to white.

glumes absent;

upper glumes shortly pubescent, 5-veined, margins entire;

lower lemmas transversely rugose at maturity, glabrous, 5-veined, margins entire;

upper florets dark glossy brown.

= 20, 30, 40.

= 40.