Flora of North America species comparison

60-140 cm, erect;

nodes glabrous.

80-110 cm, erect;

nodes glabrous.

pubescent;

ligules 2-4 mm;

blades to 37 cm long, 2.2-11 mm wide, flat.

glabrous, sparsely pubescent apically;

ligules 1-2.9 mm;

blades 9-41 cm long, 3-7 mm wide, mostly involute, pubescent above, glabrous below.

terminal, with 2-5 racemosely arranged branches;

branches 3.7-13 cm, divergent to erect;

branch axes 0.2-0.8 mm wide, glabrous, margins scabrous, terminating in a spikelet.

terminal, with 1-5(10) racemosely arranged branches;

branches 1.9-11.4 cm, erect to divergent, terminating in a spikelet;

branch axes 0.4-0.7 mm wide, very narrowly winged, scabrous.

3.1-4 mm long, 2-2.5 mm wide, paired, not imbricate, appressed to the branch axes, elliptic to obovate, yellow-brown.

1.6-2.2 mm long, 1.1-1.3 mm wide, paired, imbricate, appressed to the branch axes, elliptic-obovate to ovate.

present or absent;

upper glumes glabrous or sparsely pubescent basally, (6)7-veined, margins entire;

lower lemmas glabrous or sparsely pubescent basally, lacking ribs over the veins, 5-veined, margins entire;

upper florets white.

absent;

upper glumes shortly pubescent, 5-veined, margins entire;

lower lemmas glabrous or shortly pubescent, lacking ribs over the veins, 3-veined, margins entire;

upper florets 1.4-2 mm, white to stramineous.

2.6-2.9 mm, purple.

= unknown.

= 60.