Flora of North America species comparison

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Coreopsis tinctoria

Coreopsis hamiltonii
Coreopsis tinctoria

atkinson's coreopsis, calliopsis, Columbia coreopsis, coreopsis, golden tick-seed, plains coreopsis

Mt. Hamilton tickseed
Habit Annuals, (10–)30–70(–150+) cm. Annuals, (3–)10–20+ cm.
Leaves

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.

lobes oblong to linear, 1–8(–15) × 0.5–1 mm.
Peduncles

1–5(–15+) cm.

3–9(–18) cm.
Ray florets

8;

laminae 3.5–8 mm.
Ray laminae

usually yellow with red-brown blotch, sometimes red-brown in proximal 1/3–9/10 and distally yellow, rarely yellow throughout, 12–18+ mm.

Disc florets/Disc corollas

2.5–3+ mm.

ca. 40;

corollas 2.5–3.5 mm.
Phyllaries

± lance-oblong to lance-ovate, 4–7(–9) mm.

8, ± lance-ovate, 4–8 mm.
Calyculi

of deltate-lanceolate bractlets 1–3+ mm.

of 3–5 oblong to linear bractlets 1–3(–5) mm.
Cypselae

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.

Disc cypselae

narrowly oblanceolate, 4–5 mm;

pappi ca. 1 mm.
Ray cypselae

narrowly obovate, 5–6 mm.
Paleae

seldom basally adnate to and falling with disc cypselae.
2n

= 24 (+ 0–2 Bs).

= 24.

Coreopsis tinctoria

Coreopsis hamiltonii
Phenology Flowering year round, mostly Jun–Aug. Flowering Mar–May.
Habitat Moist, sandy or clay soils, sometimes alkaline flats, prairies, ditches, disturbed places Talus slopes, rocky soils
Elevation (0–)20–1500(–2000) m ((0–)100–4900(–6600) ft) 600–1300 m (2000–4300 ft)
Distribution
from FNA
AL; AR; AZ; CA; CO; CT; DC; DE; FL; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; MT; NC; ND; NE; NH; NJ; NM; NY; OH; OK; OR; PA; RI; SC; SD; TN; TX; VA; VT; WA; WI; WV; WY; AB; BC; MB; ON; QC; SK; Mexico (Coahuila, Nuevo León, Tamaulipas)
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
Discussion

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.)
Source FNA vol. 21, p. 197. FNA vol. 21, p. 188.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Coreopsidinae > Coreopsis > sect. Calliopsis Asteraceae > tribe Heliantheae > subtribe Coreopsidinae > Coreopsis > sect. Pugiopappus
Sibling taxa
C. auriculata, C. basalis, C. bigelovii, C. californica, C. calliopsidea, C. delphiniifolia, C. douglasii, C. gigantea, C. gladiata, C. grandiflora, C. hamiltonii, C. integrifolia, C. intermedia, C. lanceolata, C. latifolia, C. leavenworthii, C. major, C. maritima, C. nudata, C. nuecensis, C. palmata, C. pubescens, C. pulchra, C. rosea, C. stillmanii, C. tripteris, C. verticillata
C. auriculata, C. basalis, C. bigelovii, C. californica, C. calliopsidea, C. delphiniifolia, C. douglasii, C. gigantea, C. gladiata, C. grandiflora, C. integrifolia, C. intermedia, C. lanceolata, C. latifolia, C. leavenworthii, C. major, C. maritima, C. nudata, C. nuecensis, C. palmata, C. pubescens, C. pulchra, C. rosea, C. stillmanii, C. tinctoria, C. tripteris, C. verticillata
Synonyms C. atkinsoniana, C. cardaminefolia, C. tinctoria var. atkinsoniana, C. tinctoria var. similis Leptosyne hamiltonii
Name authority Nuttall: J. Acad. Nat. Sci. Philadelphia 2: 114. (1821) (Elmer) H. Sharsmith: Madroño 4: 214. (1938)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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