Flora of North America species comparison

15-80 cm, erect;

nodes glabrous.

40-75 cm, erect, not swollen at the base;

nodes pubescent.

glabrous, pubescent distally;

ligules 0.5-0.8 mm;

blades 7-23 cm long, 1.5-8 mm wide, flat.

pubescent;

blades to 15 cm long, 5-10 mm wide, flat, pubescent.

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, with 3-8 racemosely arranged branches;

branches 2-7 cm, spreading, terminating in a spikelet;

branch axes narrow, sparsely pubescent.

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

2-2.5 mm long, 1.4-1.6 mm wide, paired, imbricate, appressed to the branch axes, ovate.

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;

upper glumes shortly pubescent, 3-veined, margins entire;

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

upper florets pale to stramineous or golden brown.

0.9-1.1 mm, white to yellow.

= 18, 20, 40, 80.

= unknown.