Flora of North America species comparison

30-100 (120) cm.

15-60 cm, ascending, glabrous.

usually keeled below, glabrous;

ligules 0.2-0.5 mm;

blades (6)10-30(50) cm long, 1-5 mm wide, flat, glabrous on both surfaces.

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.

20-35(50) cm long, 0.3-2.2(3) cm wide, contracted, narrow, sometimes included in the uppermost sheath;

primary branches 0.4-2.5(5) cm, appressed or spreading to 40° from the rachis, as long or longer than the adjacent internodes;

secondary branches appressed, spikelet-bearing to near the base;

pulvini glabrous;

pedicels 0.1-1.8 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.

2-2.6(2.7) mm, plumbeous to light brownish.

1.1-1.5 mm.

subequal, ovate or obovate, membranous;

lower glumes 0.5-1 mm, often without midveins;

upper glumes 0.8-1.6 mm, 1/2 - 2/3 as long as the florets, acute to obtuse, entire;

lemmas 1.8-2.6(2.7) mm, ovate, membranous, glabrous, acute or obtuse;

paleas 1.9-2.4 mm, ovate, membranous, glabrous;

anthers 3, 0.5-1.1 mm, white, sometimes purple-tinged.

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.

1-1.2 mm, quadrangular, laterally compressed, reddish-brown, truncate.

0.6-0.9 mm, oblong, light brown;

embryos 0.2-0.4 mm.

= 18, 24, 36.