Mikania cordifolia (L.F.) Willd.

Slender sparingly branched vines; stems yellowish-green to brownish, rather hexagonal, slightly striate, glabrate to minutely puberulous, the larger stems sometimes fistulose. Leaves opposite; blades broadly ovate 5-15 cm long and 3-12 cm wide, the base cordate to deeply cordate, the margins subentire to coarsely and bluntly dentate, the apex usually distinctly short-acuminate, the surface densely short-puberulous to glabrate with distinct glandular punctations below, the venation strongly trinervate from base; petioles slender, 2.0-5.5 cm long. Inflorescence a corymbose panicle with subcymose branches; heads often in clusters of 3; ultimate branches to 3 mm long, puberulous to glabrate. Heads ca. 8-9 mm high; subinvolucral bract broadly elliptical to obovate, 3.0-4.5 mm long, acute to short-acuminate, sparsely to densely puberulous; involucral bracts oblong-lanceolate with short to long-acute tips, 6-7 mm long, ca. 1 mm wide, the outer pair usually distinctly puberulous; corolla white, ca. 4 mm long, the tube narrow, 1.5-2.0 mm long, the limb narrowly campanulate, cleft to about middle into narrow lobes, scattered glands on outer surface, few to many papillae on the lower surface within, cells subquadrate and ca. 25 microns wide; anther appendages firm,

A tropical plant. It grows in pastures and along rivers.