Diffuse, scandent or drooping shrubs; stems to 10-40 dm long, internodes with a sharp longitudinal ridge.
Leaves widely spaced, chartaceous, broadly ovate, elliptic, broadly elliptic, or rarely broadly ovate-cordate, 6-10 cm long, 2.5-7 cm wide, lateral veins ascending, slightly raised on lower surface, higher order venation conspicuously reticulate, lower surface sparsely hirtellous, especially on veins, apex acuminate to caudate, base cuneate to rounded, occasionally somewhat cordate, petioles 0.4-0.7 cm long, bases slightly connate below stipules, stipules deltate, sharply carinate, 3-4 mm long, adnate to inner side of petiole base, apex with a mucro 0.6-1.5 mm long.
Flowers perfect and pistillate, in compound, thyrsoid, terminal panicles up to 30 cm long, lateral branches abortive at first node of inflorescence or flowering late, ultimate branches terminating in open cymes, inflorescences sparsely to moderately hirtellous throughout, pedicels ca. 1-2 mm long, glabrous to sparsely hirtellous; hypanthium urceolate-turbinate, 1-1.2 mm long, sparsely hirtellous; calyx lobes oblong, ca. 1 mm long, ca. 0.3-0.5 mm wide, apex obtuse; corolla green, the tube reddish purple, fleshy, salverform, the tube 7-9 mm long, the limb strongly quadrangular in bud, apex not depressed, the lobes 3-5 mm long, spreading to reflexed, margins reflexed, apex with well-developed linear appendages up to 1.5 mm long; stamens inserted just below corolla lobe sinuses; style densely hirsute in lower 1/3, 2-lobed in upper 1/2.
Capsules subglobose, slightly compressed, 2.8-3.3 mm long, 3.5-4 mm in diameter, dehiscing loculicidally across disk, later separating to ca. 1/2 to base, not or very tardily separating septicidally, endocarp sclerified, disk nearly flat or slightly depressed, with a groove along the septum, short-hirtellous.
Seeds dull dark brown, irregularly cuneiform or subpeltate, minutely rugulose-pitted.