Flora of North America species comparison

4-55 cm, erect;

nodes pubescent.

40-100 cm, erect;

nodes glabrous.

glabrous or pubescent;

ligules 1-4 mm;

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

pubescent or glabrous;

ligules 0.2-0.4 mm;

blades 5-27 cm long, 1.9-8 mm wide, flat, glabrous, pubescent behind the ligules, margins scabrous, often ciliate basally.

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 2-6 racemosely arranged branches;

branches 1.5-7.5 cm, diverging to spreading;

branch axes 0.5-0.8 mm wide, narrowly winged, terminating in a spikelet.

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

1-1.3 mm long, 0.7-0.9 mm wide, paired, appressed to the branch axes, elliptic to elliptic-obovate, glandular pubescent, stramineous to light or golden brown.

absent;

upper glumes and lower lemmas veinless;

upper florets white.

absent;

upper glumes and lower lemmas 3-veined;

upper florets 0.8-1.1 mm, stramineous.

0.8-0.9 mm, translucent, white.

0.9-1.1 mm in diameter, orbicular, amber.

= 20.

= 40.