Flora of North America species comparison

20-110 cm, erect;

nodes glabrous.

10-53 cm, erect;

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.

pubescent or glabrous;

ligules 2-4.1 mm;

blades 5-25(80) cm long, 2.9-10.2(12) mm wide, flat.

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 racemosely arranged branches;

branches 1.1-5.4(7) cm, divergent;

branch axes 0.8-1.3 mm wide, not or narrowly winged, 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.

2.1-2.6 mm long, 1.7-2.4 mm wide, paired, appressed to the branch axes, broadly obovate to suborbicular, shortly pubescent, light to dark brown.

2-3 mm, white.

1.3-1.5 mm, white.

glumes absent;

upper glumes glabrous, 5-veined;

lower lemmas 5-veined, margins inrolled;

upper florets light yellow to white.

glumes absent;

upper glumes and lower lemmas shortly pubescent, 5-7-veined, margins entire;

lower paleas rarely present;

upper florets dark glossy brown.

= 20, 30, 40.

= 30,32,40,60.