Flora of North America species comparison

4-55 cm, erect;

nodes pubescent.

40-90 cm, erect;

nodes purple.

glabrous or pubescent;

ligules 1-4 mm;

blades 10-40 cm long, 8-22 mm wide, flat, glabrous or sparsely pubescent.

glabrous;

ligules 0.1-0.3 mm;

blades 4-13 cm long, 10-22 mm wide, flat, glabrous.

terminal, with (7)20-70 racemosely arranged branches;

branches 1.2-9.5 cm, diverging to spreading, occasionally arcuate, disarticulating at maturity;

branch axes 0.7-1.5 mm wide, broadly winged, glabrous, margins scabrous, extending beyond the distal spikelet.

terminal, with 40-75 racemosely arranged branches;

branches 1-2.5 cm, divergent to erect;

branch axes 1-1.5 mm wide, terminating in a pedicellate spikelet.

1.1-1.9 mm long, 0.5-0.8 mm wide, solitary, appressed to the branch axes, elliptic, pubescent, white.

2.5-2.9 mm long, 0.8-1.2 mm wide, paired, appressed to or divergent from the branch axes, linear-elliptic, pubescent, stramineous or purplish.

absent;

upper glumes and lower lemmas veinless;

upper florets white.

absent;

upper glumes and lower lemmas rugose, shortly ciliate;

lower lemmas lacking ribs over the veins;

upper florets 1.3-1.6 mm, stramineous, oblong elliptic, pale, shiny.

0.8-0.9 mm, translucent, white.

white.

= 20.

= unknown.