Large woody vine, mostly high climbing; stems at first quadrate, soon terete, scabridulous with minute, white appressed hairs, often mottled. Leaves opposite, ovate, to 15 cm long, coriaceous, apically acuminate, basally obtuse or rounded, the margins crenate-dentate, the teeth callose tipped, pinnately veined with 1-2-pairs of strong veins diverging successively near the base, both sides scabridulous with scattered, small appressed, verrucose hairs, appressed pubescent on the major veins; petiole slender, to 15 mm long, the slender wings upfolded, the bases united in an interpetiolar ridge. Inflorescence a terminal aggregate of few-several heads, sometimes disposed in dichasial or subumbellate groups; bracts foliaceous; pedicels stout, deeply furrowed, scabrid, to 4 cm long, sometimes with a solitary bracteole along the length. Heads radiate, showy, globose, 1.2-1.8 cm across (not counting ray corollas); involucral bracts numerous in 1-3 similar but unequal series, 3-4 mm long, 2-4 mm wide, obovate, green to stramineous, indurate, often recurved apically, callose-mucronulate, the basally impressed midvein flanked by two sometimes elevated veins, dorsally puberulent; receptacle convex; paleas conspicuous, ca. 6 mm long, stramineous, indurate, enfolding the florets, the apex callose-sclerified into a'thick, pointed umbo, strongly nerved, ciliate on the margins and costa; ray florets several in one series, the corolla orange or yellow, the tube short, flattened, the limb 10-15 mm long, ca. 4 mm wide, denticulate, the staminodes and style wanting, the ovary sterile, rudimentary; disc florets numerous, ca. 7 mm long, the corolla yellow, the tube short, the limb opening gradually upwards, ca. 4 mm long, the lobes obtuse, papillose-ciliate, the anthers black, ca. 2 mm long, the appendages yellow, the base auriculate, the style branches lanceolate, unappendaged, pilose, the style base not expanded, the nectary large, ca. 0.2 mm tall, cupular, apically sinuate, sometimes green, the ovary prismatic, with one short, stout, early deciduous awn arising from one of the angles. Achene black, ca. 5 mm long, prismatic, plump, the pericarp soft, fleshy, the endocarp black, flinty, apically surmounted by a small peg (the nectary); epappose.