Mikania micrantha Kunth

Slender, sparingly branched vines; stems yellowish or brownish, terete to slightly 4-angled, slightly striate, glabrate to sparsely puberulous, mostly fistulose. Leaves opposite; blades ovate, 3-13 cm long and to 10 cm wide, the base cordate to deeply cordate, the margins subentire to coarsely dentate, the apex narrowly short-acuminate, the surface glabrate with numerous pale glandular punctations, strongly trinervate from the base; petioles slender, 1-6 cm long. Inflorescence a corymbose panicle with subcymose branches, heads often in clusters of 3; ultimate branches up to 2 mm long, usually glabrous. Heads 4-5 mm high; subinvolucral bract narrowly elliptical to narrowly obovate, ca. 2 mm long, short-acuminate, glabrous to short-puberulous; involucral bracts oblong with short-acuminate tips, ca. 3.5 mm long, ca. 1 mm wide, glabrous to short-puberulous; corolla white, 2.5-3.0 mm long, the tube narrow, 1.0-1.3 mm long, the limb broadly campanulate with partially to fully developed ridges of papillae inside, the lobes about as long as wide and strongly recurved when old, the outer surface with a few pale glands, the corolla cells mostly quadrate and less than 25 ,u wide; anther aopendages firm, triangular-ovate; style base glabrous, the style appendages with short papillae. Achenes 4-5-ribbed, 1.5-2.0 mm long with many scattered pale glands; pappus of 35-40 slender bristles mostly in 1 series, the tips usually slightly enlarged.

Disturbed forest, stream banks, roadsides, pastures, plantations and cultivated crops in humid, sunny or shaded habitats at elevations up to 2,000 metres.

In Hawai'i the species is used for therapeutic purposes, with the macerated plant being applied to wounds, insect stings and skin irritations (A.C.Smith, Fl. Vitiensis Nova 5: 299 (1991)). It has been occasionally grown in Queensland as a medicinal herb.

Can be grown by cuttings or seedlings.