Flora of North America species comparison

7-35(60) cm, erect or decumbent.

6.5-100 cm.

rounded below, margins and apices hairy, hairs to 3 mm;

ligules 0.3-1 mm;

blades 2-12(20) cm long, 2-6 mm wide, flat, abaxial surface glabrous, adaxial surface scabridulous, sometimes sparsely hispid, margins ciliate-pectinate.

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

ligules about 0.5 mm, the sides with a few hairs to 1.5 mm;

blades 7-30 cm long, 1-2(3) mm wide, flat, becoming involute, tapering to a fine point.

4-15(18) cm long, 0.3-6 cm wide, open (contracted when immature), pyramidal;

lower nodes with 7-12(15) branches;

primary branches 0.5-4.5 cm, spreading 30-90° from the rachis, with elongated glands, without spikelets on the lower 1/3 – 1/2, secondary branches appressed;

pedicels 0.1-0.5 mm, appressed.

20-40 cm long, 0.4-1 cm wide, narrowly contracted, sometimes spikelike;

primary branches appressed to strongly ascending, spikelet-bearing to the base, lower branches 1.5-3 cm, much shorter than the adjacent internodes, usually appressed;

pedicels 0.1-0.5 mm.

1.2-1.8 mm, plumbeous or brownish, often secund along the branch.

1.1-1.5 mm, dark green.

unequal, ovate to obovate, membranous;

lower glumes 0.3-0.7 mm, without midveins;

upper glumes 1.2-1.8 mm, at least 2/3 as long as the florets, often longer;

lemmas 1.2-1.7 mm, ovate to elliptic, membranous, glabrous, acute;

paleas 1.1-1.6 mm, ovate to elliptic, membranous, glabrous;

anthers 0.2-0.4 mm, yellowish or purplish.

obtuse, often erose;

lower glumes 0.4-0.5 mm;

upper glumes 0.5-0.6 mm, less than 2/3 as long as the florets;

lemmas 1.1-1.5 mm, glabrous, 1-veined, obtuse;

paleas similar to the lemmas or slightly longer;

anthers 2, 0.4-0.6 mm.

0.6-1 mm, obovoid, faintly striate, light brownish.

0.7-0.8 mm, often adhering to the floret at maturity, quadrangular to somewhat turbinate, red-brown, apices truncate and concave.

= 24, 36, 54.

= unknown.