Flora of North America species comparison

60-140 cm, erect;

nodes glabrous.

50-80 cm, erect.

pubescent;

ligules 2-4 mm;

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

glabrous, pubescent apically, margins scarious;

ligules 1-2 mm, membranous, lacerate;

blades 3-4 mm wide, flat, glabrous, pubescent behind the ligules, margins papillose-ciliate.

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, erect, a spicate raceme 7-15 cm long, or a panicle with 1-2 subterminal spicate branches that are wholly or partially enclosed in the upper sheath, often arcuate;

branches terminating in a spikelet.

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

2.7-3 mm, paired, imbricate, obovate, stramineous.

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, or 1-2.3 mm;

upper glumes and lower lemmas glabrous, 3-veined, margins entire;

lower lemma lacking ribs over the veins;

lower florets often staminate;

lower paleas 2.5-2.9 mm, membranous;

upper florets 2.3-2.9 mm, white, stramineous, or golden brown.

2.6-2.9 mm, purple.

= unknown.

= 40.