雙花蟛蜞菊

Subshrubs; stems elongate, branched, scandent, coarsely appressed-strigose. Cauline leaves thick chartaceous, long-petiolate, ovate, 7-14×3-8 cm, acuminate at apex, rounded at base, margins much-toothed, appressed-strigose on both surfaces; petioles 12-23 mm long. Heads 3-6, terminal, 2-3 cm wide, peduncles 1.5-5.5 cm, slender; involucre 10-13×5-7 mm, bracts in 1 series, ovate-lanceolate or narrowly ovate, gradually narrowed to tip, densely appressed-strigose. Ray florets yellow, in one row; corolla 9-13 mm long, 2- or 3-dentate. Disc florets yellow; corolla 5 mm long, apex 5-dentate. Achenes 3-3.5×2-2.5 mm, cuneate at base, often 3-angled, coarsely strigose toward tip. Pappus bristles 2-2.5 mm long.

TAIPEI: Tanshui, Chuwei, Peng 4503; Keelungyu, Peng 14100. ILAN: Chuangwei, Peng 7029. TAINAN: Anping, Wang 7832. PINGTUNG: Chialoshui, Peng 7162. TAITUNG: Lanyu Is., Peng 7208; Taimali, Chen 505. HUALIEN: Takeng, Peng 7366.

India to Pacific islands through southeast Asia, south China and Japan. Taiwan, in littoral regions.