Climbers, deciduous. Branches solid or becoming hollow. Branchlets glabrous. Leaves sessile or petiole to 3 mm; leaf blade elliptic to lanceolate or ovate, 4-12 × 2-3 cm, abaxially glaucous, shortly white hispid, sometimes with dense, stiff, yellow hairs on lower part of midvein, very rarely glabrous, adaxially glabrescent, midvein and margin sometimes purple-reddish at base, base attenuate and decurrent to petiole, margin cartilaginous, apex obtuse or ± acute. Inflorescence at apices of branchlets, shortly pedunculate; peduncle 3-11 mm; involucral bract of 1 pair of perfoliate leaves 4-10 cm across, apex acute; flowers sessile and verticillate, 6 per whorl; whorls 2-4 clustered into a capitulum; internode below involucral bract 3-7 cm; bracts narrowly ovate, ca. 1 mm; bracteoles minute, glabrous. Ovaries pyriform, glabrous. Calyx lobes minute, triangular or ovate. Corolla bilabiate, yellow to orange-yellow, reddish outside in upper part, 5-9 cm, outside glabrous; tube not gibbous at base, 4-7 cm, inside sparsely puberulent; upper lip shallowly 4-lobed; lower lip narrowly oblong. Stamen and style exserted, glabrous. Style with swollen nectary at base. Berries turning from yellow to red-yellow when mature, eventually deep red, subglobose, ca. 1 cm in diam.; seeds whitish, ellipsoid, ca. 2 mm, pitted. Fl. May-Jul, fr. Jul-Oct.
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A climber. It loses its leaves during the year. The leaves are 4-12 cm long by 2-3 cm wide. The flowers are in groups of 6 in a ring. They are yellow to orange and reddish in the upper part.
It is a temperate plant. It grows in rocky crevices near rivers between 1,000-2,000 m above sea level in China. In Sichuan.
Can be grown by cuttings or seedlings. Seeds needs stratification.
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