Flora of North America species comparison

90-200 cm, erect;

nodes sunken, glabrous or pubescent, brown.

10-53 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.

pubescent or glabrous;

ligules 2-4.1 mm;

blades 5-25(80) cm long, 2.9-10.2(12) 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 1-5 racemosely arranged branches;

branches 1.1-5.4(7) cm, divergent;

branch axes 0.8-1.3 mm wide, not or narrowly winged, glabrous, terminating in a spikelet.

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

2.1-2.6 mm long, 1.7-2.4 mm wide, paired, appressed to the branch axes, broadly obovate to suborbicular, shortly pubescent, light to dark brown.

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 shortly pubescent, 5-7-veined, margins entire;

lower paleas rarely present;

upper florets dark glossy brown.

1.3-1.5 mm, white.

florets white to stramineous.

= 40, 60.

= 30,32,40,60.