Flora of North America species comparison

30-110 cm, stout, erect;

nodes glabrous.

15-70 cm, erect;

nodes glabrous or pubescent.

glabrous;

ligules 2-3 mm;

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

pubescent, sometimes sparsely so;

ligules 1-1.9 mm;

blades to 35 cm long, 1.9-16.2 mm wide, flat, sparsely pubescent on both surfaces, margins ciliate basally.

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 2-8 racemosely arranged branches;

branches 2-6.4 cm, diverging to erect;

branch axes 0.9-1.6 mm wide, winged, glabrous, margins scabrous, 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.

2.5-3.5 mm long, 2.4-3 mm wide, paired, appressed to the branch axes, suborbicular, stramineous.

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 1.9-2.1 mm, ovate, winged, 1-veined, margins ciliate-lacerate;

upper florets 1.7-1.9 mm, stramineous.

1.4-1.6 mm, brown.

0.9-1.1 mm, orbicular, white.

= 20, 40, 60.

= 20.