Wedelia chinensis (Osbeck.) Merr. in Philipp. J. Sci. 12: 111. 1917. Solidago chinensis Osbeck., Dagb. Ostind. Tesa. 241 . 1757. Wedelia calendulacea (L.) Less., Syn. Gen. Comp. 222. 1832; Hook.f., Fl. Brit. India 3: 306. 1881.

Herbs, procumbent or ascending, rooting at the lower nodes; stems reddish, glabrous. Leaves spathulate-oblanceolate, acute, trinerved, attenuate margins flat or slightly inrolled, entire or feebly serrate, 2 - 6 x 0.5 - 1.5 cm, shortly appressed hairy on both the surfaces, subpetiolate. Heads yellow, solitary on terminal peduncles, 5 - 7 mm across; peduncles 3 - 7 cm long. Involucral bracts in 2 series; outer oblong, 5 - 8 x 2 - 3 mm, acute or obtuse at the apex, appressed pubescent; inner lanceolate, 5 - 7 x 1 - 2.5 mm. Ray florets few; corolla 6 - 8 x 3 - 4 mm long. Achenes dark brown, 4 - 5 x 2 - 3 mm, rugulose, glabrous; those of ray florets triquetrous; those of disc florets compressed. Pappus a minute, irregularly margined, withered cup at maturity.

Fl. & Fr. Throughout the year.

Distrib. India: In marshy places. Assam, W. Bengal, W. & E. Peninsula, Tamil Nadu and Andaman & Nicobar islands.

Sri Lanka, China, Malay Peninsula and Japan.