Flora of North America species comparison

30-110 cm, stout, erect;

nodes glabrous.

10-150 cm, erect or decumbent;

nodes glabrous.

glabrous;

ligules 2-3 mm;

blades to 35 cm long, 2-5.4 mm wide, conduplicate (rarely flat).

glabrous;

ligules 0.3-1.2 mm, often with a row of hairs behind them;

blades 5-30 cm long, 2-8(12) mm wide, flat, usually glabrous.

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 1-5 digitately or racemosely arranged branches;

branches 3-10 cm, diverging to spreading, persistent;

branch axes 1.5-3 mm wide, broadly winged, glabrous, margins scabrous, 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.

1.8-3.2 mm long, 2-2.3 mm wide, solitary, diverging from the branch axes, ovate, glabrous, olive green to dark, glossy 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 as long as the lower lemmas, 5-7-veined;

lower lemmas 3-5-veined;

upper florets 2.5-3 mm long, 1.4-1.8 mm wide, dark glossy brown.

1.4-1.6 mm, brown.

1.1-1.5 mm, nearly orbicular.

= 20, 40, 60.

= 20, 40, 60, 120.