Flora of North America species comparison

90-200 cm, erect;

nodes sunken, glabrous or pubescent, brown.

80-110 cm, erect;

nodes glabrous.

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, sparsely pubescent apically;

ligules 1-2.9 mm;

blades to 62 cm long, 3-7 mm wide, mostly involute, pubescent above, glabrous below.

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 3-15 racemosely arranged branches;

branches 5.2-12.5 cm, divergent to spreading, terminating in a spikelet;

branch axes 0.3-0.8 mm wide, very narrowly winged, scabrous.

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

2.2-2.5 mm long, 1-1.3 mm wide, paired, appressed to the branch axes, elliptic to obovate, white to light 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 glabrous, 5-veined;

lower lemmas glabrous, 3-veined;

upper florets 1.4-2 mm, white to stramineous.

1-1.6 mm, suborbicular, brown.

florets white to stramineous.

= 40, 60.

= unknown.