Coreopsis rosea

Flora of North America

as described under Coreopsis rosea

Perennials, 10-30(-60) cm. Internodes (± mid stem) 1-4(-5+) cm. Leaves mostly cauline; opposite; petioles 0-1 mm, ciliate or not; blades lance-linear to linear or filiform, 20-45(-60) × 1-2(-3+) mm, rarely with 1-2 lateral lobes. Peduncles 2-4(-6+) cm. Calyculi of oblong to linear bractlets 1.5-2+ mm. Phyllaries deltate-ovate, 4.5-5.5 mm. Ray laminae pinkish to white, 9-15+ mm. Disc florets 40-60+; corollas ochroleucous to yellow, 2.5-3 mm. Cypselae narrowly oblong, 1.3-1.8 mm, not winged; pappi 0. 2n = 26.Flowering Aug-Sep. Sandy shores, marsh edges, etc.; 0-50 m; N.S.; Del., Mass., N.J., Pa., R.I., S.C.

Herbarium specimens

https://botanydb.colorado.edu/COLO_V/01253/01253483_tn.jpg
https://oregonflora.org/imglib/OSU_V/OSC-V-065/OSC-V-065249_tn.jpg