Flora of North America species comparison

60-140 cm, erect;

nodes glabrous.

15-70 cm, erect;

nodes glabrous or pubescent.

pubescent;

ligules 2-4 mm;

blades to 37 cm long, 2.2-11 mm wide, 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 2-5 racemosely arranged branches;

branches 3.7-13 cm, divergent to erect;

branch axes 0.2-0.8 mm wide, glabrous, margins scabrous, 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.

3.1-4 mm long, 2-2.5 mm wide, paired, not imbricate, appressed to the branch axes, elliptic to obovate, yellow-brown.

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

present or absent;

upper glumes glabrous or sparsely pubescent basally, (6)7-veined, margins entire;

lower lemmas glabrous or sparsely pubescent basally, lacking ribs over the veins, 5-veined, margins entire;

upper florets white.

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.

2.6-2.9 mm, purple.

0.9-1.1 mm, orbicular, white.

= unknown.

= 20.