Coreopsis grandiflora var. harveyana (A. Gray) Sherff; C. grandiflora var. longipes (Hooker) Torrey & A. Gray; C. grandiflora var. saxicola (Alexander) E. B. Smith; C. saxicola Alexander

Perennials, 40–60+ cm. Aerial nodes proximal to first peduncle usually 6–10+, distalmost 1–3 internodes 4–7+ cm. Leaves: mostly cauline on proximal ²/3–⁷/8 of plant heights; petioles 0 or 10–35+ mm; blades usually 1(–2)-irregularly pinnately or ± pedately lobed with (3–)5–9+ lobes, rarely simple, simple blades or terminal lobes narrowly lanceolate to linear or filiform, 15–45(–90+) × (0.5–)2–8(–12+) mm. Peduncles 8–15(–25+) cm. Calyculi of lanceolate to linear bractlets 3.5–9+ mm. Phyllaries lance-ovate, 7–9(–12) mm. Ray laminae yellow, 12–25+ mm. Disc corollas 3.3–4.8 mm, apices yellow. Cypselae 2–3+ mm, wings spreading, ± chartaceous, entire or irregularly toothed to pectinate. 2n = 26 (+ 0–2B).

Flowering May–Aug. Sandy soils, ditches and roadsides, other disturbed sites, granite and sandstone outcrops; 30–300+ m; Ont., Que.; Ala., Ark., Conn., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mich., Miss., Mo., N.J., N.Mex., N.Y., N.C., Ohio, Okla., Pa., R.I., S.C., Tenn., Tex., Vt., Va., W.Va., Wis.

Coreopsis grandiflora var. inclinata J. R. Allison from glades in Alabama may merit recognition.