Flora of North America species comparison

80-210 cm, erect;

nodes glabrous or pubescent.

15-70 cm, erect;

nodes glabrous or pubescent.

glabrous or pubescent;

ligules 1.2-3.3 mm;

blades to 52 cm long, 3-18 mm wide, flat, glabrous or pubescent, usually densely pubescent behind the ligules.

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 1-6 racemosely arranged branches;

branches 3-17.9 cm, divergent to erect, terminating in a spikelet;

branch axes 0.3-1.8 mm wide, glabrous, the margins scabrous.

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.

2.9-4.1 mm long, 1.9-3.1 mm wide, paired, imbricate, appressed to the branch axes, elliptic to suborbicular to orbicular, glabrous, stramineous.

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

absent;

upper glumes glabrous, 5-veined, margins entire;

lower lemmas glabrous, lacking ribs over the veins, 3-veined, margins entire;

upper florets golden 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.

2.8 mm, amber.

0.9-1.1 mm, orbicular, white.

= 120, 140, ca. 160-170.

= 20.