Flora of North America species comparison

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

15-60 cm, ascending, glabrous.

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.

shorter than the internodes, glabrous;

ligules 0.5-1 mm, ciliate;

blades 4-12 cm long, 1.5-6 mm wide, flat, spreading, evenly distributed, adaxial surfaces sparsely ciliate-pustulate.

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.

6-22 cm long, (1)5-13 cm wide, open, sometimes contracted;

branches terminating in a spikelet, lowest branches whorled, in verticels of 7-20;

pedicels (2)3-6(8) mm, widely spreading, capillary.

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

1.1-1.5 mm.

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.

thin, acute;

lower glumes about 0.5 mm;

upper glumes 1.1-1.5;

lemmas 1.1-1.4 mm, acute;

paleas 1-1.3 mm, hyaline.

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

0.6-0.9 mm, oblong, light brown;

embryos 0.2-0.4 mm.

= 24, 36, 54.