Flora of North America species comparison

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

nodes glabrous.

10-50 cm, decumbent;

nodes glabrous or pubescent.

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 2-2.5 mm;

blades to 12 cm long, 1.3-4.8 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 2-6 racemosely arranged branches;

branches 1.3-5.3 cm, diverging to erect, often arcuate, persistent;

branch axes 1.8-3 mm wide, broadly winged, usually conduplicate, 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.

1.7-2.1 mm long, 1.1-1.4 mm wide, solitary, appressed to the branch axes, elliptic to ovate, glabrous, stramineous.

1.9-2.1 mm, brown.

1-1.3 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 5-veined;

upper florets stramineous, lemmas glabrous throughout.

= 20, 40.

= 40, 60.