Flora of North America species comparison

80-210 cm, erect;

nodes glabrous or pubescent.

23-125 cm, erect;

nodes 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.

glabrous or pubescent;

ligules 0.6-1.9 mm;

blades to 38 cm long, 4-18 mm wide, flat, glabrous or pubescent, dark green.

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.

terminal, with 1-3(4) racemosely arranged branches;

branches 2.3-13.4 cm, erect to divergent, terminating in a spikelet;

branch axes 0.2-1 mm wide, glabrous, margins scabrous.

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.

2.1-3.3 mm long, 1.3-1.6 mm wide, paired, imbricate, appressed to the branch axes, elliptic to obovate, stramineous to brown.

absent;

upper glumes glabrous, 5-veined, margins entire;

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

upper florets golden brown.

0.4-1.2(1.8) mm, stramineous to brown;

upper glumes with papillose-based short pubescence, 3- or 5-veined, margins entire, lower lemmas with papillose-based short pubescence, lacking ribs over the veins, 3-veined, margins entire;

upper florets light stramineous.

2.8 mm, amber.

1.3-1.5 mm, light to dark brown.

= 120, 140, ca. 160-170.

= 40, 60.