Caudex obovate-conical, to 5.5 cm, to 1.6 cm in diam. Stem twining, ca. 3 m tall, base 1.2--2.4 cm in diam., branched, apically sparsely retrorse pubescent. Cauline leaves with petiole 4--8 cm, sparsely retrorse pubescent; leaf blade pentagonal or ovate-pentagonal, 7--8.5 × ca. 10 cm, both surfaces becoming glabrous, base cordate, 3-parted; central lobe rhombic; lateral lobes obliquely flabellate, unequally 2-lobed. Inflorescence 5--10-flowered; rachis and pedicels glabrous or nearly so; proximal bracts leaflike, others ovate-linear. Pedicels 1.6--3 cm, proximally with 2 bracteoles; bracteoles linear or linear-subulate, ca. 3 mm, usually glabrous. Sepals blue-purple, abaxially glabrous; lower sepals ca. 1.2 cm; lateral sepals 1--1.5 cm; upper sepal galeate or navicular-galeate, 2.5--4 mm from base to beak. Petals glabrous; claw sometimes slightly geniculate at apex; lip ca. 4.5 mm, slightly concave; spur incurved, ca. 1.5 mm. Stamens glabrous; filaments entire. Carpels 5, glabrous. Follicles erect, ca. 1.3 cm; persistent style ca. 2.2 mm. Seeds ca. 1.5 mm. Fl. Aug--Sep.

* Forests; 2800--3300 m. NW Yunnan.