Blumea riparia (Blume) DC., Prodr. 5: 444. 1836. Conyza riparia Blume, Bijdr 899. 1826 (non H.B.K.); Hook.f. in Fl. Brit. India 3: 268. 1881.

Scandent undershrubs or shrubs. Stem woody at base, 0.50-2.5 m tall branched, branches terete, grooved, glabrate or sparsely puberulous in younger parts particularly inflorescence axis. Leaves obovate-oblong to elliptic-oblong, base rounded, shortly acuminate, margins mucronulate-denticulate with rigid teeth, 2.5-13.0 x 1.3-5 cm, both surfaces glabrous or only sparsely hairy, subsessile. Heads· 8-13 mm in diam., in terminal or axillary, lax paniculate recemes, on 2-2.5 cm long peduncle. Involucral bracts almost equal to florets, 1-10 mm long, outer ones distinctly oblong-ovate, up to 1.5 mm broad, hairy on the back, inner ones linear-oblong, scarious, sparsely hairy. Receptacles flat, 2-5 mm in diam., densely hairy. Corolla of bisexual florets yellow, tubular 5-6 mm long with 5, triangular, papillate, hairy lobes; that of female florets filiform, 4-5.5 mm long, 2-4-lobed, occasionally pubescent on lobes. Pappus white, 4-6 mm long, copious. Achenes pale brown, oblong, ribbed, pubescent.

Fl. & Fr. Throughout the year.

Distrib. India: E. Himalayas, growing in thickets on open grassy plains, in clearings along streams and river banks, ascending up to 1500 m. Sikkim, Assam and Andaman & Nicobar Islands.

Myanmar, Malaya, China, Indochina, Philippines, Indonesia, New Guinea and Solomon Islands.