Coreopsis sect. Leptosyne

(de Candolle) O. Hoffmann

in H. G. A. Engler and K. Prantl, Nat. Pflanzenfam. 54[IV,5]: 243. 1891.

Basionym: Leptosyne de in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 531. 1836
Treatment appears in FNA Volume 21. Treatment on page 188. Mentioned on page 186, 189.

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.


Calif., nw Mexico.


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



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
... more about "Coreopsis sect. Leptosyne"
John L. Strother +
(de Candolle) O. Hoffmann +
Leptosyne de +
Calif. +  and nw Mexico. +
in H. G. A. Engler and K. Prantl, Nat. Pflanzenfam. +
Undefined (tribe Undefined) subtribe Coreopsideae +  and Undefined (tribe Undefined) subtribe Petrobiinae +
Coreopsis sect. Leptosyne +
Coreopsis +
section +