Flora of North America species comparison

90-200 cm, erect;

nodes sunken, glabrous or pubescent, brown.

30-110 cm, decumbent and rooting at the lower nodes;

nodes glabrous.

pubescent;

ligules 4-5 mm, membranous, brown, acute;

blades 12-40 cm long, 8-35 mm wide, flat or conduplicate, pubescent below, glabrous above, distinctly pubescent basally.

glabrous;

ligules 1-2.3 mm;

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

terminal, with 8-25 racemosely arranged branches;

branches 1-8 cm, divergent to erect;

branch axes 1-1.2 mm wide, margins scabrous, terminating in a spikelet;

pedicels 0.2-0.4 and 0.5-1.2 mm long, flattened, 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.

1.8-2 mm, paired, appressed to or divergent from the branch axes, oblong-elliptic, white to stramineous.

2.5-3 mm long, 1.3-1.6 mm wide, paired, appressed to the branch axes, elliptic, light brown.

absent;

lower lemmas glabrous, ribbed over the veins, sulcate between, 5-veined, margins entire;

upper lemmas as long as the lower ones, longitudinally papillose-striate, glabrous, pale-colored.

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.

1.6-1.8 mm, brown.

florets white to stramineous.

= 40, 60.

= 20, 30, 40.