Flora of North America species comparison

30-100 (120) cm.

30-80(90) 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 0.2-0.6 mm;

blades 5-22(28) cm long, 0.8-2(2.2) mm wide, flat to v-shaped in cross section, folded or involute when dry, green, remaining so well into winter, glabrous abaxially, mostly glabrous adaxially but densely pilose basally, margins glabrous or 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.

10-25 cm long, 2-10(13) cm wide, longer than wide, open (contracted when immature), not diffuse, pyramidal to ovate;

lower nodes with 1-2(3) branches;

primary branches 2-9(10) cm, ascending or spreading to 80° from the rachis, not capillary, without spikelets on the lower 1/3;

secondary branches mostly appressed;

pulvini glabrous or hairy;

pedicels 0.5-4(8) mm, usually shorter than the spikelets, appressed, glabrous.

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

3.5-6.6 mm, purplish-brown.

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.

equal to subequal, linear-lanceolate, membranous;

lower glumes (2.9)3.5-6.2 mm, 0.9-1.2(1.3) times as long as the upper glumes;

upper glumes 3.2-6.6 mm, from almost as long as to longer than the florets;

lemmas 3.4-4.5 mm, ovate to lanceolate, membranous, glabrous, acute;

paleas 3.4-4.5 mm, ovate, membranous, glabrous;

anthers 1.5-2.8 mm, yellow to purplish.

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

1.1-1.4 mm, fusiform, reddish-brown.

= 18, 24, 36.

= unknown.