Vines, to 3 m; stems densely hirtellous, hirsute-hirtellous, or glabrescent, drying dark yellow. Leaves opposite; petiole 2.5-7 cm, densely hirtellous to tomentose-hirtellous; blade drying papery, ovate, oblong-ovate, or elliptic-ovate, 6-17 × 3-11 cm, adaxially sparsely to moderately scabrid to hirtellous, abaxially hirtellous, pilosulous, or pilose with pubescence denser along veins, base cordate, cordulate, truncate, or rarely acute, margins flat, apex acute to acuminate; secondary veins 5-8 pairs; stipules generally caducous, triangular, 4-10 mm, acute. Inflorescences axillary and/or terminal, spiciform to narrowly paniculate, cylindrical to narrowly pyramidal, 7-30 cm, branched to 1-3 orders, densely hirtellous to hirtellous-tomentose, pedunculate; bracts triangular, 1-2 mm. Flowers sessile in congested cymules or small heads. Calyx densely hirtellous; hypanthium portion turbinate to ellipsoid, 1-1.5 mm; limb lobed nearly to base; lobes subulate to narrowly triangular, 1-2 mm. Corolla funnelform, outside densely hirtellous to tomentulose; tube 5-6 × 2.5-3 mm, without slits; lobes ovate, 1-2 mm. Fruit globose, 5-6 × 5-6 mm, glabrous, drying orange-yellow; pyrenes plano-convex to concavo-convex. Fl. Jun, fr. Jun-Nov.
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A climber with dense white hairs. It keeps growing from year to year. The leaves are opposite and oblong. They are 6-13 cm long by 3-8 cm wide. They taper to the tip. There are prickly hairs above and woolly hairs underneath. The edges are jagged. The leaf stalk is 1-5 cm long. The flowers are light purple. They are in irregular groups that do not have a stalk. The flowers are bell shaped and 5-6 mm long. The fruit is round and hairy. It is pale yellow and 4-6 mm across.
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