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Coreopsis tinctoria

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

Leavenworth's tickseed

Habit Annuals, (10–)30–70(–150+) cm. Annuals, (10–)30–70(–150+) 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.

proximal blades usually 1(–2)-pinnate, terminal lobes ± elliptic or oblanceolate to lanceolate or linear, 15–30+ × 4–8(–12+) mm;

cauline blades simple or 1(–3)-pinnate, simple blades or terminal lobes narrowly oblanceolate to linear, 8–35(–70+) × 1–3(–5) mm.

Peduncles

1–5(–15+) cm.

2–5(–8) cm.

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.

usually yellow throughout, rarely with proximal red-brown blotch, 8–15+ mm.

Disc corollas

2.5–3+ mm.

2.2–3.5 mm.

Phyllaries

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

± lance-oblong to lanceolate, (4–)5–9 mm.

Calyculi

of deltate-lanceolate bractlets 1–3+ mm.

of deltate-ovate to oblong or linear bractlets 2–6+ 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.

2–3 mm, wings 0.2–0.8+ mm wide;

pappi of 2 subulate scales (0.2–)0.4–1(–1.4+) mm.

2n

= 24 (+ 0–2 Bs).

= 24 (+ 0–2 Bs).

Coreopsis tinctoria

Coreopsis leavenworthii

Phenology Flowering year round, mostly Jun–Aug. Flowering year round, mostly May–Jul.
Habitat Moist, sandy or clay soils, sometimes alkaline flats, prairies, ditches, disturbed places Moist, sandy soils, flatwoods, ditches
Elevation (0–)20–1500(–2000) m ((0–)100–4900(–6600) ft) 0–20+ m (0–100+ 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)
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from FNA
FL
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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.)

Plants here (and generally) treated as Coreopsis leavenworthii probably should be included within the circumscription adopted here for C. tinctoria.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 21, p. 197. FNA vol. 21, p. 197.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Coreopsidinae > Coreopsis > sect. Calliopsis Asteraceae > tribe Heliantheae > subtribe Coreopsidinae > Coreopsis > sect. Calliopsis
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. hamiltonii, C. integrifolia, C. intermedia, C. lanceolata, C. latifolia, 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
Name authority Nuttall: J. Acad. Nat. Sci. Philadelphia 2: 114. (1821) Torrey & A. Gray: Fl. N. Amer. 2: 346. (1842)
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