Flora of North America species comparison

15-80 cm, erect;

nodes glabrous.

50-80 cm, erect.

glabrous, pubescent distally;

ligules 0.5-0.8 mm;

blades 7-23 cm long, 1.5-8 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, usually composed of a pair of branches, a third branch sometimes present below the terminal pair;

branches 2.5-12.7 cm, diverging to spreading, often arcuate, persistent;

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

1.3-1.9 mm long, 0.8-1.1 mm wide, solitary, appressed to the branch axes, ovate, stramineous.

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

absent;

upper glumes pilose on the margins, veinless or 2-3-veined;

lower lemmas glabrous, veinless or 2-3-veined;

upper florets whitish to golden yellow.

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.

0.9-1.1 mm, white to yellow.

= 18, 20, 40, 80.

= 40.