Coreopsis tinctoria |
Coreopsis leavenworthii |
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atkinson's coreopsis, calliopsis, Columbia coreopsis, coreopsis, golden tick-seed, plains coreopsis |
Leavenworth's tickseed |
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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 |
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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 |
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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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 | ||
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) | Torrey & A. Gray: Fl. N. Amer. 2: 346. (1842) |
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