Flora of North America species comparison

40-120 cm, erect;

nodes glabrous or pubescent.

80-210 cm, erect;

nodes glabrous or pubescent.

glabrous or pubescent;

ligules 1.5-3.8 mm;

blades to 37 cm long, 2-9.3 mm wide, flat, glabrous or pubescent.

glabrous or pubescent;

ligules 1.2-3.3 mm;

blades to 52 cm long, 3-18 mm wide, flat, glabrous or pubescent, usually densely pubescent behind the ligules.

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 1-6 racemosely arranged branches;

branches 3-17.9 cm, divergent to erect, terminating in a spikelet;

branch axes 0.3-1.8 mm wide, glabrous, the margins scabrous.

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.

2.9-4.1 mm long, 1.9-3.1 mm wide, paired, imbricate, appressed to the branch axes, elliptic to suborbicular to orbicular, glabrous, stramineous.

absent;

upper glumes 3-veined, lower lemmas 5-veined;

upper florets pale to stramineous.

absent;

upper glumes glabrous, 5-veined, margins entire;

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

upper florets golden brown.

about 2 mm, white to yellow-brown.

2.8 mm, amber.

= 20, 58, 70, 80.

= 120, 140, ca. 160-170.