Flora of North America species comparison

15-80 cm, erect;

nodes glabrous.

90-200 cm, erect;

nodes sunken, glabrous or pubescent, brown.

glabrous, pubescent distally;

ligules 0.5-0.8 mm;

blades 7-23 cm long, 1.5-8 mm wide, flat.

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.

terminal, usually composed of a pair of branches, a third branch sometimes present below the terminal pair;

branches 2.5-12.7 cm, diverging to spreading, often arcuate, persistent;

branch axes 0.2-0.8 mm wide, glabrous, margins scabrous, terminating in a reduced spikelet.

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.

1.3-1.9 mm long, 0.8-1.1 mm wide, solitary, appressed to the branch axes, ovate, stramineous.

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

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.

absent;

upper glumes pilose on the margins, veinless or 2-3-veined;

lower lemmas glabrous, veinless or 2-3-veined;

upper florets whitish to golden yellow.

0.9-1.1 mm, white to yellow.

florets white to stramineous.

= 18, 20, 40, 80.

= 40, 60.