Annuals. Leaves mostly basal, seldom cauline; mostly alternate, sometimes opposite; blades simple or 1–2-pinnately lobed. Calyculi of (3–) 5–8 bractlets. Phyllaries 5–8. Ray-florets (5–) 8 (–12+), pistillate, fertile; laminae yellow, ± obovate or flabellate, each broadest distal to middle, apices entire or 2–3-toothed. Disc-florets 8–60 (–100+); corollas yellow (to orange), lobes 5; style-branch apices ± truncate or deltoid. Paleae oblong or lanceolate to linear. Cypselae ± oblong to spatulate, wings ± corky to chartaceous, entire, ± spreading, not ciliolate, faces smooth or ± tuberculate; pappi 0 or coroniform (0.1–0.2 mm). x = 12.

Distribution

Calif., nw Mexico

Discussion

Species 3 (3 in the flora).

The name Coreopsis sect. Leptosyne has been misattributed to S. F. Blake, Proc. Amer. Acad. Arts 49: 341. 1913.

Selected References

None.

Lower Taxa

Coreopsis californica, Coreopsis douglasii, Coreopsis stillmanii

Key

1	Leaf blades simple or 1(–2)-pinnately lobed, terminal lobes spatulate to narrowly oblanceolate, 1–3 mm wide; calyculus bractlets ciliolate near bases	Coreopsis stillmanii
1	Leaf blades simple or pinnately lobed, terminal lobes filiform to linear, 0.5–1(–1.5) mm wide; calyculus bractlets not ciliolate	> 2
2	Cypselae marked adaxially with red dots or dashes near wing/body interface, wings ± corky-thickened, faces ± tuberculate and/or hirtellous	Coreopsis californica
2	Cypselae not marked adaxially with red, wings usually thin, sometimes corky-thick-ened, faces usually smooth, rarely tuberculate, not hirtellous	Coreopsis douglasii

"broader" is not a number.