Vine, woody; branchlets hirsute with slender, unbranched, mostly straight, rufescent trichomes 0.5-3.5 mm long; older branches eventually glabrous, thicken-ing, developing gray or grayish-brown bark. Leaves spreading; petioles 1-6 mm long, typically conspicuously fulvous-hirsute, sometimes twisted or curved; blades ovate or lanceolate to elliptic or oblanceolate, 4.5-20 cm long, 2-8 cm broad, apically acuminate, basally rounded or subcordate to acute, chartaceous or some-times membranous, sparsely to moderately pubescent above and below with trichomes similar to those of the branchlets (often rather densely hirsute below on the midvein toward the base), (3)5-plinerved, the primary nerves raised below and impressed above, the reticulation prominulous to faint on both surfaces. In-florescences terminal, cymose. Flowers with pedicels obsolete to 5.5 mm long (the median pedicel of each dichasial unit much shorter than the laterals); calyx-lobes lanceolate to subulate, 1-7 mm long, hirsute but usually not densely so, the tube absent or virtually so; corolla salverform, white or yellow, externally conspicuously hirsute with simple, straight or interwoven, rufescent trichomes 0.5-3.5 mm long, the tube 10-16 mm long, 1-1.5 mm broad, pilose internally on the upper 1/2 with trichomes to ca 1.5 mm long, the lobes internally minutely papillose throughout, in addition densely bearded at the base, 1.5-2.5 mm long, lanceolate to oblong-lanceolate or ovate-lanceolate; anthers 0.7-1 mm long, ovate, glabrous, inserted at the corolla-throat (often with the tips protruding), the free-portion of the fila-ments obsolete or essentially so; ovary 2-locular, subglobose, ca 1 mm long, with the carpellary sutures evident externally, passing manifestly into the long and tapering style, the style, glabrous, exserted by 0.5-2 mm, terminating in a small capitate stigma. Fruit hard, bluish-green, 4-7 cm in diam.
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