Flora of North America species comparison

5-160 cm, erect, not rooting at the lower nodes;

nodes glabrous.

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

nodes glabrous.

densely pubescent, occasionally glabrous;

ligules 1-2.2 mm;

blades to 55 cm long, 2.2-8.3 mm wide, conduplicate (occasionally flat), glabrous below, pubescent above.

glabrous;

ligules 1-2.4 mm;

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

terminal, with 2-10 racemosely arranged branches;

branches 0.8-10.3 cm, divergent to spreading, often arcuate, terminating in a spikelet;

branch axes 0.8-2 mm wide, narrowly winged, glabrous, margins scabrous.

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.

2.1-3.1 mm long, 2-2.8 mm wide, paired, imbricate, appressed to divergent from the branch axes, orbicular to suborbicular, stramineous.

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

1.9-2.1 mm, brown.

2-3 mm, white.

glumes absent;

upper glumes and lower lemmas glabrous, 3-veined, margins entire;

upper florets white to light yellow.

glumes absent;

upper glumes and lower lemmas glabrous, 5-veined;

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

= 20, 40.

= 40.