Flora of North America species comparison

30-130 cm, decumbent;

nodes glabrous or pubescent.

40-100 cm, erect;

nodes glabrous.

glabrous or pubescent;

ligules 1-3.2 mm;

blades to 31 cm long, 4-18 mm wide, flat, glabrous, with a few hairs behind the ligules.

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 2-7 racemosely arranged branches;

branches 2.2-7.9 cm, divergent to spreading, terminating in a spikelet;

branch axes 1.1-2.3 mm wide, narrowly winged, glabrous, margins scabrous.

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.

2.8-3.6 mm long, 1.5-2 mm wide, paired, imbricate, appressed to divergent from the branch axes, elliptic to obovate, pubescent or glabrous, light brown to 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 and lower lemmas glabrous or sparsely pubescent, hairs shorter than 0.1 mm, 3-veined, margins entire;

lower lemmas lacking ribs over the veins;

upper florets stramineous.

absent;

upper glumes and lower lemmas 3-veined;

upper florets 0.8-1.1 mm, stramineous.

1.8-2 mm, golden brown or white.

0.9-1.1 mm in diameter, orbicular, amber.

= 60, ca. 64.

= 40.