Bidens uapensis (Forest Brown) Sherff

Erect, suffrutescent perennial herbs 0.6–3 m tall. Leaves simple, 4.5–12 cm long including petiole, blades lanceolate to lanceolate-elliptic, 3–8.5 × 1–4 cm, mostly glabrous, except for a tuft of hairs on lower surface at base, margins serrulate to serrate, apex acuminate to occasionally acute. Heads 3–12(–16), in diffuse cymes, terminating main stem and lateral branches, 2–8 mm in diameter excluding rays, peduncles 0.4–7 cm long, stout; outer involucral bracts 1.5–8 mm long, well differentiated from inner bracts, margins ciliate, inner bracts often with a tuft of hairs at apex; ray florets 5–11 per head, sterile, rays yellow, 7–15 × 1.5–5 mm; disk florets ca. 23–25, perfect. Achenes gray or black, straight, 3–5 × 0.5 mm, tipped, margin setose; pappus of 2 irregularly antrorse barbed awns.

Marquesas Islands, endemic to Ua Pou, 6–920 m.

Bidens uapensis là một loài thực vật có hoa trong họ Cúc. Loài này được (F.Br.) Sherff mô tả khoa học đầu tiên năm 1937.