Coreopsis tinctoria |
Coreopsis nudata |
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atkinson's coreopsis, calliopsis, Columbia coreopsis, coreopsis, golden tick-seed, plains coreopsis |
Georgia tickseed |
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Habit | Annuals, (10–)30–70(–150+) cm. | Perennials, 40–60(–100+) 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. |
basal and cauline; alternate; petioles ± terete, 5–30+ cm × 0.5–2+ mm, not ciliate; blades none. |
Peduncles | 1–5(–15+) cm. |
4–8+ 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. |
purplish to pinkish, 12–20(–30+) mm. |
Disc florets/ |
2.5–3+ mm. |
60–120+; corollas ochroleucous to yellow, 3.5–4.5 mm. |
Phyllaries | ± lance-oblong to lance-ovate, 4–7(–9) mm. |
lance-ovate, 7–8 mm. |
Calyculi | of deltate-lanceolate bractlets 1–3+ mm. |
of lance-deltate to lance-ovate bractlets 2–5 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. |
narrowly oblong to linear, 2.5–3+ mm, winged, wings ± pectinate, 0.2–0.4+ mm wide; pappi of 2 subulate scales 1–1.5 mm. |
Internodes | (± mid stem) 5–25 cm. |
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2n | = 24 (+ 0–2 Bs). |
= 26. |
Coreopsis tinctoria |
Coreopsis nudata |
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Phenology | Flowering year round, mostly Jun–Aug. | Flowering Apr–May. |
Habitat | Moist, sandy or clay soils, sometimes alkaline flats, prairies, ditches, disturbed places | Ditches, pond margins, swamps, in pine barrens |
Elevation | (0–)20–1500(–2000) m ((0–)100–4900(–6600) ft) | 0–50+ m (0–200+ ft) |
Distribution |
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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AL; FL; GA; LA; MS
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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.) |
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Source | FNA vol. 21, p. 197. | FNA vol. 21, p. 196. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | C. atkinsoniana, C. cardaminefolia, C. tinctoria var. atkinsoniana, C. tinctoria var. similis | |
Name authority | Nuttall: J. Acad. Nat. Sci. Philadelphia 2: 114. (1821) | Nuttall: Gen. N. Amer. Pl. 2: 180. (1818) |
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