Flora of North America species comparison

30-110 cm, stout, erect;

nodes glabrous.

30-100 cm, strongly decumbent, upright portion usually not standing more than 20 cm tall, much branched;

nodes glabrous.

glabrous;

ligules 2-3 mm;

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

glabrous;

ligules 1-2.4 mm;

blades to 7 cm long, 3-6.5 mm wide, flat.

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 2-5 racemosely arranged branches;

branches 2-6 cm, diverging, persistent;

branch axes 2-3.3 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.

3.2-4 mm long, 1.6-1.7 mm wide, solitary, appressed to the branch axes, elliptic, abruptly pointed, stramineous.

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 and lower lemmas glabrous, 5-veined;

upper florets stramineous, lemmas with a few minute hairs at the apices.

1.4-1.6 mm, brown.

2-3 mm, white.

= 20, 40, 60.

= 40.