Flora of North America species comparison

30-100 (120) cm.

70-120 cm.

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.

shiny and indurate basally, glabrous or appressed hairy elsewhere, hairs to 4 mm;

ligules 0.2-0.8 mm;

blades 15-52 cm long, 1-2.5 mm wide, flat, folded or involute, bluish-green, remaining so well into winter, glabrous on both surfaces, margins scabridulous.

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.

21-50 cm long, 5-12(15) cm wide, longer than wide, open, not diffuse, pyramidal to ovate, with few spikelets;

lower nodes with 1-2(3) branches;

primary branches 6-20 cm, ascending, spreading 20-50° from the rachis, not capillary, without spikelets on the lower 1/4–1/2;

secondary branches appressed to loosely spreading;

pulvini glabrous;

pedicels 3-8(14) mm, longer or shorter than the spikelets, appressed, glabrous, scabrous.

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

4.5-7(7.2) mm, purplish.

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.

subequal to unequal, linear-lanceolate to lanceolate, membranous;

lower glumes 3-4.6 mm, 0.6-0.9 times as long as the upper glumes;

upper glumes 4-7.2 mm, from slightly shorter to longer than the spikelets;

lemmas 4.4-6.5 mm, lanceolate, membranous, glabrous, acuminate to acute;

paleas 4.5-6.7 mm, lanceolate, membranous, glabrous;

anthers 3, 3.5-5 mm, purplish.

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

1.8-2.2 mm, obovoid, laterally flattened, light brownish.

= 18, 24, 36.

= unknown.