Herbs to subshrubs. Stems to 1 m, pubescent to puberulent, glabrescent. Leaves mostly near stem apex, equal, rarely unequal in a pair; petiole 0.5-2.5 cm; leaf blade lanceolate to ovate or obovate, 7-17 X 3-6.5 cm, adaxially sparsely puberulent to strigose, abaxially glabrous to sparsely puberulent, sparsely pubescent to sparsely villous along veins, base slightly oblique, cuneate to subcordate, margin serrulate to entire, apex acuminate. Cymes 3-7-flowered; peduncle 1.5-6.5 cm, glandular puberulent to pubescent; bracts 2, persistent, lanceolate to ovate, ca. 3-6 X 1-3 mm, margin entire. Calyx 5-sect from base; segments ovate to lanceolate or oblong, 4-6 X 1-3 mm. Corolla yellow, 3.5-4.9 cm; tube 3-3.5 cm; adaxial lip 5-7 mm; abaxial lip 1-1.3 cm. Adaxial stamens 6-9 mm, abaxial ones 1.2-1.5 cm; anther thecae confluent; staminode absent. Pistil 2.4-3.5 cm, sparsely pubescent to glandular puberulent. Style 1.2-1.7 cm; stigmas oblong, 1-2 mm. Capsule 3-4.5 cm. Fl. Sep-Oct, fr. Oct.

* Shady and damp places under forests or by streams; 1400-1700 m. SE Yunnan (Pingbian Xian).