Flora of North America species comparison

30-110 cm, stout, erect;

nodes glabrous.

80-150 cm, erect;

nodes glabrous.

glabrous;

ligules 2-3 mm;

blades to 35 cm long, 2-5.4 mm wide, conduplicate (rarely 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, with 2-7 racemosely arranged branches;

branches 1.6-7.1 cm, usually divergent, rarely merely ascending;

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

2.5-3 mm long, 1.5-2.2 mm wide, paired, appressed to the branch axes, elliptic-ovate, light to dark brown.

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 usually with short, appressed pubescence, rarely glabrous, 5-veined, margins entire;

lower lemmas with short, appressed pubescence or glabrous, 3-veined, margins entire;

upper florets dark glossy brown.

absent;

upper glumes glabrous, 3-veined;

lower lemmas glabrous, 5-veined;

upper florets glossy chestnut brown.

1.4-1.6 mm, brown.

= 20, 40, 60.

= unknown.