Flora of North America species comparison

80-210 cm, erect;

nodes glabrous or pubescent.

15-96 cm, erect or prostrate, often rooting at the lower nodes;

nodes glabrous.

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.

glabrous;

ligules 1-3.2 mm;

blades to 56 cm long, 2.2-15 mm wide, flat.

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 1-10(28) racemosely arranged branches;

branches 1.2-8.2 cm, diverging;

branch axes 0.7-2.3 mm wide, glabrous, broadly winged, wings about as wide as the central portion, 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.

2-2.2 mm long, 1.3-1.8 mm wide, paired, appressed to the branch axes, glabrous, broadly elliptic, obovate, or orbicular, light to dark brown.

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 glabrous, 5-veined, margins entire;

lower lemmas glabrous, 3-5-veined, margins entire;

upper florets dark glossy brown.

2.8 mm, amber.

1.4-1.6 mm, white.

= 120, 140, ca. 160-170.

= 40.