Flora of North America species comparison

80-210 cm, erect;

nodes glabrous or pubescent.

10-50 cm, decumbent;

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;

ligules 2-2.5 mm;

blades to 12 cm long, 1.3-4.8 mm wide, flat.

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 2-6 racemosely arranged branches;

branches 1.3-5.3 cm, diverging to erect, often arcuate, persistent;

branch axes 1.8-3 mm wide, broadly winged, usually conduplicate, glabrous, margins scabrous, terminating in a spikelet.

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.

1.7-2.1 mm long, 1.1-1.4 mm wide, solitary, appressed to the branch axes, elliptic to ovate, glabrous, 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.

absent;

upper glumes and lower lemmas 5-veined;

upper florets stramineous, lemmas glabrous throughout.

2.8 mm, amber.

1-1.3 mm, white.

= 120, 140, ca. 160-170.

= 40, 60.