Coreopsis nuecensis

Annuals, 10-30(-50+) cm. Aerial nodes proximal to first peduncle usually 1-3(-5), distalmost 1-3 internodes 2-4(-9+) cm. Leaves: basal and cauline on proximal ¹/5-¹/3(-¹/2) of plant heights; petioles 1-8+ cm; blades simple or 1(-2)-pinnately lobed, simple blades or terminal lobes ± elliptic to lanceolate, 10-30 × 5-15 mm. Peduncles (5-)10-25+ cm. Calyculi of ± deltate to lance-oblong bractlets 4-6(-8) mm. Phyllaries lance-oblong, 6-8(-10+) mm. Ray laminae yellow, usually each with (2-)4-8+ proximal, red-brown or purple flecks, 12-18+ mm. Disc corollas 2.5-3.2 mm, apices yellow. Cypselae 2.5-4 mm, wings spreading, ± chartaceous, entire. 2n = 12, 14, 18, 20.

Flowering Mar-May. Sandy soils in post-oak and oak-mesquite woodlands; 10-200+ m; Fla., Tex.