Flora of North America species comparison

10-65 cm, erect to decumbent.

35-120 (150) 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, apices glabrous or sparsely hairy, hairs to 6 mm;

ligules 0.1-0.3 mm;

blades (3)10-45(60) cm long, (1)2-5(6) mm wide, flat to involute, glabrous abaxially, scabridulous adaxially, margins smooth or scabridulous;

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.

(10)15-45 cm long, 15-25 cm wide, diffuse, subpyramidal, often included in the uppermost sheath;

primary branches 1.5-13 cm, spreading 30-90° from the rachis;

secondary branches spreading, without spikelets on the lower 1/4 - 1/3;

pulvini glabrous;

pedicels 0.5-2 mm, spreading, glabrous or scabrous.

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

1.3-2.8 mm, 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 0.5-1.8 mm, often without midveins;

upper glumes 1.1-2.4(2.8) mm, at least 2/3 as long as the florets;

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

paleas 1.1-2.4 mm, ovate, membranous, glabrous;

anthers 1.1-1.8 mm, yellowish to purplish.

not known.

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

= 20, 30.

= 80, 90, 108, 126.