Caudex carrot-shaped or fusiform, small, 0.8--1.5 cm. Stem 5--30(--45) cm tall, simple or basally branched, basally glabrous, apically sparsely retrorse and appressed pubescent. Basal leaves long petiolate; petiole 2.5--14 cm, glabrous, base without distinct sheath; leaf blade reniform-pentagonal or reniform, 1--2 × 1.4--3 cm, abaxially glabrous, adaxially sparsely pubescent, 3-parted nearly to middle; central lobe rhombic-obtrapezoid; lateral lobes obliquely flabellate, unequally 2-fid nearly to middle. Cauline leaves 1--3, shortly petiolate. Inflorescence 1--5-flowered; rachis and pedicels retrorse pubescent; proximal bracts leaflike, others linear. Proximal pedicels 2.5--6 cm, distal ones ca. 2 cm, with 2 distal bracteoles or bordering flower, bracteoles linear, 6--7 × 0.5--1 mm. Sepals violet or purple, abaxially sparsely pubescent; lower sepals ca. 1 cm; lateral sepals ca. 1.6 cm; upper sepal navicular, ca. 1.6 cm from base to beak, lower margin slightly concave or suberect. Petals glabrous; claw slender; limb small, ca. 2.5 mm; lip ca. 1.5 mm, slightly concave; spur ± headlike, ca. 1 mm, slightly concave. Stamens sparsely pubescent; filaments sparsely pubescent, entire or 2-denticulate. Carpels 5, sparsely pubescent. Follicles 1--1.2 cm. Seeds obpyramidal, ca. 2 mm. Fl. Sep.
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