假泽兰 jia ze lan

Eupatorium cordatum N. L. Burman, Fl. Indica, 176. 1768; Mikania volubilis Willdenow.

Herbs, perennial, climbing. Stems slender, many branched, sparsely shortly pubescent or subglabrous. Median leaves: petiole 2.5-6 cm; blade triangular-ovate, 4-10 × 2-7 cm, both surfaces sparsely shortly pubescent, glabrescent or glabrous by anthesis, base cordate, margin entire or repand-crenate; upper leaves gradually smaller, shortly petiolate, triangular or lanceolate, base truncate or cuneate. Capitula numerous in terminal corymb or compound corymb; peduncle slender, pubescent or glabrous, with linear-lanceolate bracteole leaves; phyllaries narrowly elliptic, 5-7 mm, sparsely pubescent and glandular, distinctly 3-veined, apex obtuse or slightly acute; corollas white, 3.5-5 mm, with slender tube and campanulate limb, sparsely puberulent. Achenes narrowly elliptic, ca. 3.5 mm, 4-ribbed, glandular; pappus off-white or rather reddish, 3.5-4 mm. Fl. and fr. Aug-Nov. 2n = 34, 36, 38.

Thickets, forests; 100-1700 m. Hainan, Taiwan, SE Yunnan [Borneo, Cambodia, Indonesia (Java), Laos, New Guinea, Philippines, Thailand, Vietnam; probably widespread throughout SE Asia].