Flora of North America species comparison

40-120 cm, erect;

nodes glabrous or pubescent.

40-100 cm, erect;

nodes glabrous.

glabrous or pubescent;

ligules 1.5-3.8 mm;

blades to 37 cm long, 2-9.3 mm wide, flat, glabrous or 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 1-6 racemosely arranged branches;

branches 2-10.9 cm, diverging to spreading (rarely erect), persistent;

branch axes 0.6-1.3 mm wide, glabrous, margins scabrous, terminating in a 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.

2.3-3.3 mm long, 2-2.7 mm wide, solitary, appressed to the branch axes, elliptic to obovate or nearly orbicular, glabrous, stramineous.

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 3-veined, lower lemmas 5-veined;

upper florets pale to stramineous.

absent;

upper glumes and lower lemmas 3-veined;

upper florets 0.8-1.1 mm, stramineous.

about 2 mm, white to yellow-brown.

0.9-1.1 mm in diameter, orbicular, amber.

= 20, 58, 70, 80.

= 40.