Caudex carrot-shaped, 6--7 cm, 0.7--1.3 cm in diam., sometimes subterete, small, to 12 cm. Stem twining, curved, branched, pubescent, with leaves equally arranged along stem. Middle cauline leaves long petiolate; petiole 5.5--7.5 cm, retrorse pubescent; leaf blade pentagonal, 8--10 × 9--14 cm, abaxially sparsely pubescent at veins, adaxially sparsely pubescent, 3-parted; central lobe rhombic or broadly rhombic, apex acuminate; lateral lobes obliquely flabellate, unequally 2-fid. Inflorescence 4--12 cm, 2--6-flowered; rachis and pedicels ± densely retrorse pubescent; bracts leaflike. Pedicels 2.5--3.5 cm, with 2 bracteoles near middle; bracteoles narrowly linear or subulate, 3--7 mm. Sepals blue-purple, abaxially sparsely pubescent; lower sepals ca. 1.5 cm; lateral sepals oblique, ca. 1.6 cm; upper sepal galeate, 2.3--2.6 cm high, middle 0.9--1.3 cm in diam., beak 2--6 mm, 1.8--2.1 cm from base to beak, lower margin concave. Petals glabrous; limb ca. 1.1 × 0.4 cm; lip ca. 6 mm, slightly concave; spur incurved, ca. 3 mm. Stamens glabrous; filaments entire. Carpels 5, glabrous. Follicles 2--2.2 cm. Seeds ca. 3.5 mm. Fl. Oct, fr. Oct--Nov. 2n = 16*.

* Scrub; 1700--2500 m. Yunnan (Jingdong Xian, Xinping Yi-Dai Zu Zizhixian).