Flora of North America species comparison

15-80 cm, erect;

nodes glabrous.

80-150 cm, erect;

nodes glabrous.

glabrous, pubescent distally;

ligules 0.5-0.8 mm;

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

glabrous or sparsely pubescent;

ligules 1-3 mm;

blades to 35 cm long, 2-7 mm wide, flat, glabrous above, pubescent below, especially 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 5-8 racemosely arranged branches;

branches 3.5-11 cm, divergent to erect;

branch axes 0.6-1.1 mm wide, glabrous, terminating in a spikelet.

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

2.2-2.7 mm long, 1-1.4 mm wide, paired, appressed to or divergent from the branch axes, elliptic, glabrous, light brown.

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.

absent;

upper glumes glabrous, 3-veined;

lower lemmas glabrous, 5-veined;

upper florets glossy chestnut brown.

0.9-1.1 mm, white to yellow.

= 18, 20, 40, 80.

= unknown.