Flora of North America species comparison

30-110 cm, stout, erect;

nodes glabrous.

10-53 cm, erect;

nodes glabrous.

glabrous;

ligules 2-3 mm;

blades to 35 cm long, 2-5.4 mm wide, conduplicate (rarely flat).

pubescent or glabrous;

ligules 2-4.1 mm;

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

terminal, with 2-7 racemosely arranged branches;

branches 1.6-7.1 cm, usually divergent, rarely merely ascending;

branch axes 0.6-1.1 mm wide, glabrous, 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.

2.5-3 mm long, 1.5-2.2 mm wide, paired, appressed to the branch axes, elliptic-ovate, light to dark brown.

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 usually with short, appressed pubescence, rarely glabrous, 5-veined, margins entire;

lower lemmas with short, appressed pubescence or glabrous, 3-veined, margins entire;

upper florets dark glossy brown.

absent;

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

lower paleas rarely present;

upper florets dark glossy brown.

1.4-1.6 mm, brown.

1.3-1.5 mm, white.

= 20, 40, 60.

= 30,32,40,60.