Flora of North America species comparison

80-210 cm, erect;

nodes glabrous or pubescent.

30-110 cm, decumbent and 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 1-2.3 mm;

blades to 50 cm long, 2-10 mm wide, flat, glabrous or pubescent.

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 2-6(10) racemosely arranged branches;

branches 3.5-12.5 cm, diverging to erect;

branch axes 1-2.1 mm wide, glabrous, 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 mm long, 1.3-1.6 mm wide, paired, appressed to the branch axes, elliptic, light 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.

often present, 0.5-2 mm, brown;

upper glumes glabrous, 5-veined, margins entire, lower lemmas glabrous, 5-7-veined, margins entire;

upper florets olive, golden brown, or dark brown.

2.8 mm, amber.

1.6-1.8 mm, brown.

= 120, 140, ca. 160-170.

= 20, 30, 40.