Flora of North America species comparison

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

30-80 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;

ligules 0.2-0.5 mm;

blades 10-30 cm long, 2-4 mm wide, flat, becoming folded.

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.

15-35 cm long, 0.4-4 cm wide, contracted to rather lax and open;

primary branches appressed to strongly ascending, without spikelets on the lower XA, lower branches much longer than the internodes;

pedicels 0.1-3 mm.

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

1.3-1.8 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.

0.4-0.8 mm, acuminate to truncate;

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

lemmas 1.2-1.6(1.8) mm, elliptic, glabrous, 1-veined, acute to obtuse;

paleas 1.4-1.8 mm, elliptic;

anthers 2(3), 0.5-0.8 mm.

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

0.7-0.9 mm, quadrangular, laterally compressed, reddish-brown, truncate.

= 24, 36, 54.

= 12.