Flora of North America species comparison

40-120 cm, erect;

nodes glabrous or pubescent.

10-53 cm, erect;

nodes glabrous.

glabrous or pubescent;

ligules 1.5-3.8 mm;

blades to 37 cm long, 2-9.3 mm wide, flat, 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, with 1-6 racemosely arranged branches;

branches 2-10.9 cm, diverging to spreading (rarely erect), persistent;

branch axes 0.6-1.3 mm wide, glabrous, margins scabrous, terminating in a spikelet.

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.

2.3-3.3 mm long, 2-2.7 mm wide, solitary, appressed to the branch axes, elliptic to obovate or nearly orbicular, glabrous, stramineous.

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.

absent;

upper glumes 3-veined, lower lemmas 5-veined;

upper florets pale to stramineous.

absent;

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

lower paleas rarely present;

upper florets dark glossy brown.

about 2 mm, white to yellow-brown.

1.3-1.5 mm, white.

= 20, 58, 70, 80.

= 30,32,40,60.