Flora of North America species comparison

10-65 cm, erect to decumbent.

90-250 cm, stout.

overlapping, margins ciliate, apices with tufts of hairs, hairs to 2 mm;

ligules 0.1-0.4 mm;

blades usually conspicuously distichous, 4-16 cm long, 2-5 mm wide, flat to loosely involute, glabrous abaxially, scabridulous adaxially, margins scabridulous.

rounded below, shiny, glabrous, rarely sparsely hairy apically, hairs to 6 mm;

ligules 1-2 mm;

blades 20-70 cm long, 3-10 mm wide, flat (rarely involute), glabrous abaxially, scabrous adaxially, margins scabrous;

flag blades ascending.

3-10 cm long, 0.4-1.6 cm wide, contracted, spikelike, dense;

primary branches 0.5-2 cm, appressed, spikelet-bearing to the base;

pedicels 0.2-1.4 mm, appressed.

20-60 cm long, 12-26 cm wide, open, broadly lanceolate, exserted;

primary branches 1.5-10 cm, spreading 20-70° from the rachis;

secondary branches appressed, spikelet-bearing to the base;

pulvini glabrous;

pedicels 0.2-0.5 mm, mostly appressed.

(1.8)2-3.2 mm, yellowish-white to purplish-tinged, sometimes grayish.

1.5-2.5 mm, crowded, purplish or greenish.

subequal, ovate-oblong, membranous;

lower glumes 1.5-2.4 mm;

upper glumes 1.8-3(3.2) mm;

lemmas 2.1-3 mm, ovate to lanceolate, membranous, glabrous, acute;

paleas 2.1-3 mm, ovate, membranous;

anthers 3, 1-1.7 mm, yellowish.

unequal, lanceolate to ovate, membranous;

lower glumes 0.5-1 mm, often appearing veinless;

upper glumes 0.8-2 mm, 2/3 or more as long as the florets;

lemmas 1.2-2.5 mm, ovate, membranous, glabrous, acute to obtuse;

paleas 1.1-2.5 mm, ovate, membranous, glabrous;

anthers 1.1-1.3 mm, yellowish to purplish.

not known.

1-1.4 mm, ellipsoid, reddish-brown or blackish, striate.

= 20, 30.

= 36.