Flora of North America species comparison

90-200 cm, erect;

nodes sunken, glabrous or pubescent, brown.

10-50 cm, decumbent;

nodes glabrous or pubescent.

pubescent;

ligules 4-5 mm, membranous, brown, acute;

blades 12-40 cm long, 8-35 mm wide, flat or conduplicate, pubescent below, glabrous above, distinctly pubescent basally.

glabrous;

ligules 2-2.5 mm;

blades to 12 cm long, 1.3-4.8 mm wide, flat.

terminal, with 8-25 racemosely arranged branches;

branches 1-8 cm, divergent to erect;

branch axes 1-1.2 mm wide, margins scabrous, terminating in a spikelet;

pedicels 0.2-0.4 and 0.5-1.2 mm long, flattened, 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.

1.8-2 mm, paired, appressed to or divergent from the branch axes, oblong-elliptic, white to stramineous.

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

absent;

lower lemmas glabrous, ribbed over the veins, sulcate between, 5-veined, margins entire;

upper lemmas as long as the lower ones, longitudinally papillose-striate, glabrous, pale-colored.

absent;

upper glumes and lower lemmas 5-veined;

upper florets stramineous, lemmas glabrous throughout.

1-1.3 mm, white.

florets white to stramineous.

= 40, 60.

= 40, 60.