Flora of North America species comparison

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

40-100 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.

keeled or rounded, glabrous, apices ciliate;

ligules 0.2-0.4 mm;

blades 10-40 cm long, 2-4 mm wide, flat but soon 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.

14-35 cm long, 0.4-3 cm wide, contracted, interrupted, and rather lax;

primary branches appressed to strongly ascending, spikelet-bearing to the base, lower branches 1.5-5 cm, much longer than the adjacent internodes;

pedicels 0.1-1.2(1.8) mm.

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

1.4-1.8(2) mm, plumbeous to greenish.

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.

0.3-0.5 mm, obtuse;

upper glumes 0.4-0.7 mm, usually less than M as long as the florets, faintly 1-veined, truncate, erose to denticulate;

lemmas 1.4-2 mm, elliptic, glabrous, 1-veined, acute;

paleas 1.4-2 mm, elliptic;

anthers 3(2), 0.9-1.1 mm.

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

0.7-1 mm, quadrangular, laterally compressed, reddish-brown, truncate.

= 24, 36, 54.

= 24.