Scandent shrub or climber 3-8 m high; branchlets shortly crisped-tomentose, glabrescent with age; bark reddish brown, lenticellate. Leaves shortly petioled, drying dark green or brownish above, paler below, subglabrous or sparingly pubescent with scattered hairs along the midrib and margin, eventually glabrescent, ovate-elliptic to elliptic-oblong, 2-5-4-5 cm long and 1-1-5 cm broad, base obtuse to acute, apex acute to rounded, occasionally emarginate; secondary nerves 4-6 on each side, distinct; margin incurved; petiole 2-4 mm long; axillary glands small, tooth-like. Inflorescence terminal, usually on short lateral shoots, 1-3-flowered, pubescent; bracts linear, acute, 9-10 mm long, pubescent; pedicels 7-10 mm long, crisped tomentose. Flowers yellowish with purple markings in the throat and on the outside of the tube. Calyx 1-1-3 cm long; sepals linear-lanceolate, tapering gradually to the apex, shortly pubescent. Corolla shortly and densely pubescent without and within; tube sub-cylindric for 6 mm then widening gradually to a funnel-shaped portion 7 mm long and 7-9 mm broad at the mouth; lob
