Coreopsis tinctoria
Coreopsis delphiniifolia
atkinson's coreopsis, calliopsis, Columbia coreopsis, coreopsis, golden tick-seed, plains coreopsis
larkspurleaf tickseed
proximal blades usually 1(–3)-pinnate, terminal lobes lance-ovate to oblanceolate, 10–60 × 5–25 mm;
cauline blades usually 1–2(–3)-pinnate, rarely simple, simple blades or terminal lobes lance-linear to linear or filiform, 10–45 × 0.5–2(–5+) mm.
petioles 0–1 mm;
blades simple or 3-foliolate, simple blades or leaflets usually narrowly lanceolate to lance-linear, 35–80 × 2–5(–7) mm (seldom lobed, sometimes parted into 2–3+ lance-linear to ± linear lobes).
1–5(–15+) cm.
15–45+ mm.
usually yellow with red-brown blotch, sometimes red-brown in proximal 1/3–9/10 and distally yellow, rarely yellow throughout, 12–18+ mm.
15–25(–30) mm.
2.5–3+ mm.
25–60+;
corollas yellow (often drying blackish), 5–6 mm.
± lance-oblong to lance-ovate, 4–7(–9) mm.
8, oblong-ovate, 5–6+ mm.
of deltate-lanceolate bractlets 1–3+ mm.
of 8–10 linear bractlets 3–5(–7) mm.
1.5–3(–4+) mm, wings 0 or 0.1–0.7+ mm wide;
pappi 0, or of 1–2 cusps or subulate scales 0.1–1+ mm.
oblong, 4.5–6 mm.
(± mid stem) 3–8 cm.
= 24 (+ 0–2 Bs).
= 52, 78, 104.
Coreopsis tinctoria
Coreopsis delphiniifolia
Coreopsis tinctoria is widely grown in public and residential gardens, and commercially (for cut flowers), and has become widely established in the flora area.
As here circumscribed, Coreopsis tinctoria includes plants that others (without agreement among themselves) have treated as distinct species or infraspecific taxa: C. atkinsoniana (plants mostly 50–150+ cm, seldom branched from bases; cypselae 2.5–3 mm, “narrowly” winged; pappi 0.1–0.2 mm; mostly Idaho, Montana, Oregon, Washington), C. cardaminefolia (plants mostly 20–50 cm, seldom branched at bases; cypselae 2 mm, “narrowly to widely” winged; pappi 0 or 0.1–0.2 mm; mostly Arkansas, Kansas, Louisiana, Nebraska, Oklahoma, Texas), and C. tinctoria var. similis (plants mostly 10–30 cm, usually branched from bases; cypselae 2–3 mm, “widely” winged; pappi 0.2–1 mm; Texas and Mexico).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Plants treated here as Coreopsis delphiniifolia are questionably distinct from C. major. In 1976, E. B. Smith suggested that members of the taxon he called C. ×delphiniifolia may be hybrids or progeny of hybrids involving C. verticillata and C. tripteris and, possibly, C. major. A problem with such an interpretation is that although all of the 35 or so records for C. delphiniifolia in the sense of Smith map at or near known localities for C. major, all but 2 are from well south of the known distribution of C. verticillata and only 3 are from near known localities for C. tripteris.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
- Local floras:
BC, 
CA, 
OR, 
WA - Local Web sites: CalFlora, CalPhotos,
Flora NW, 
Go Botany, 
IL Wildflowers, 
KS Wildflowers, 
LA Plants, 
MD Biodiversity, 
MI Flora, 
MN Wildflowers, 
MO Plants, 
PNW Herbaria 
WildflowerSearch
iNaturalist (observations)
USDA Plants Database- LBJ Wildflower Center
- SEINet
- Plants of the World Online
- Encyclopedia of Life
- Wikipedia
- Google Image Search
