《中国植物志》|| 菊科 COMPOSITAE ||金鸡菊属 Coreopsis L. ||两色金鸡菊 Coreopsis tinctoria Nutt.

3. 两色金鸡菊 蛇目菊（江苏南部植物手册）图版62: 4-8
Coreopsis tinctoria Nutt. in Journ. Acad. Sc. Philadelph. 2: 114. 1821; Britt. et Brown, Ill. Fl. North. Unit. Stat. 3: 432. 1898; Pamp. in Nouv. Giorn. Bot. It., n. s. 18: 38. 1911; 侯宽昭等, 广州植物志 545. 1956; 裴鉴等, 江苏南部种子植物手册766. 图1233. 1959.——Calliopsis tinctoria (Nutt.) DC., Prodr. 5: 568. 1836.
一年生草本，无毛，高30-100厘米。茎直立，上部有分枝。叶对生，下部及中部叶有长柄，二次羽状全裂，裂片线形或线状披针形，全缘；上部叶无柄或下延成翅状柄，线形。头状花序多数，有细长花序梗，径2-4厘米，排列成伞房或疏圆锥花序状。总苞半球形，总苞片外层较短，长约3毫米，内层卵状长圆形，长5-6毫米，顶端尖。舌状花黄色，舌片倒卵形，长8-15毫米，管状花红褐色、狭钟形。瘦果长圆形或纺锤形，长2.5-3毫米，两面光滑或有瘤状突起，顶端有2细芒。花期5-9月，果期8-10月。
原产北美的观赏植物。我国各地常见栽培。

《Flora of North America》|| Asteraceae || Coreopsis || Coreopsis tinctoria

28. Coreopsis tinctoria Nuttall, J. Acad. Nat. Sci. Philadelphia. 2: 114. 1821.

Coreopsis atkinsoniana Douglas ex Lindley; C. cardaminefolia Torrey & A. Gray; C. tinctoria var. atkinsoniana (Douglas ex Lindley) H. M. Parker ex E. B. Smith; C. tinctoria var. similis (F. E. Boynton) H. M. Parker ex E. B. Smith

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. Peduncles 1–5(–15+) cm. Calyculi of deltate-lanceolate bractlets 1–3+ mm. Phyllaries ± lance-oblong to lance-ovate, 4–7(–9) 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 corollas 2.5–3+ 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. 2n = 24 (+ 0–2 Bs).

Flowering year round, mostly Jun–Aug. Moist, sandy or clay soils, sometimes alkaline flats, prairies, ditches, disturbed places; (0–)20–1500(–2000) m; Alta., B.C., Man., Ont., Que., Sask.; Ala., Ariz., Ark., Calif., Colo., Conn., Del., D.C., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Mont., Nebr., N.H., N.J., N.Mex., N.Y., N.C., N.Dak., Ohio, Okla., Oreg., Pa., R.I., S.C., S.Dak., Tenn., Tex., Vt., Va., Wash., W.Va., Wis., Wyo.; Mexico (Coahuila, Nuevo León, Tamaulipas).

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).

《Flora of China》|| Asteraceae || Coreopsis ||两色金鸡菊 Coreopsis tinctoria

1. Coreopsis tinctoria Nuttall, J. Acad. Nat. Sci. Philadelphia. 2: 114. 1821.

两色金鸡菊 liang se jin ji ju

Annuals, (10-)30-70(-150) cm. Leaves: proximal blades usually 1(-3)-pinnate, terminal lobes ovate-lanceolate to oblanceolate, 10-60 × 5-25 mm; cauline blades usually 1-3-pinnate, rarely simple, simple blades or terminal lobes linear-lanceolate to linear or filiform, 10-45 × 0.5-5 mm. Peduncles 1-15 cm; calycular bracts deltate-lanceolate, 1-3+ mm; phyllaries ± oblong-lanceolate to ovate-lanceolate, 4-9 mm. Ray limbs usually yellow with red-brown blotch, sometimes red-brown in proximal 1/3-9/10 and distally yellow, rarely yellow throughout, 12-18+ mm. Disk corollas 2.5-3+ mm. Achenes 1.5-4 mm, wings absent or 0.1-0.7 mm wide; pappus absent, or of 1 or 2 cusps or subulate scales 0.1-1 mm. Fl. Jun-Aug. 2n = 24.

Moist sandy or clay soils, sometimes alkaline flats, prairies, ditches, disturbed sites. Widely cultivated and naturalized in China [native to North America].

Coreopsis tinctoria is widely grown in public and residential gardens, is grown commercially (for cut flowers), and has become widely established in the Flora area.