Flora of North America species comparison

30-110 cm, stout, erect;

nodes glabrous.

23-125 cm, erect;

nodes glabrous or pubescent.

glabrous;

ligules 2-3 mm;

blades to 35 cm long, 2-5.4 mm wide, conduplicate (rarely flat).

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 2-7 racemosely arranged branches;

branches 1.6-7.1 cm, usually divergent, rarely merely ascending;

branch axes 0.6-1.1 mm wide, glabrous, terminating in a spikelet.

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.

2.5-3 mm long, 1.5-2.2 mm wide, paired, appressed to the branch axes, elliptic-ovate, light to dark brown.

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 usually with short, appressed pubescence, rarely glabrous, 5-veined, margins entire;

lower lemmas with short, appressed pubescence or glabrous, 3-veined, margins entire;

upper florets dark glossy 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.

1.4-1.6 mm, brown.

1.3-1.5 mm, light to dark brown.

= 20, 40, 60.

= 40, 60.