Caudex carrot-shaped, 6--10 cm, 0.9--2 cm in diam. Stem 1--1.5 m tall, several branched below inflorescence, basally retrorse pubescent, apically spreading pubescent, with leaves equally arranged along stem. Proximal cauline leaves withered at anthesis, middle leaves long petiolate; petiole ca. 4.5 cm; leaf blade pentagonal, ca. 8 × 14 cm, both surfaces sparsely pubescent, or becoming glabrous, base cordate, 3-sect; central segment rhombic or broadly rhombic; lateral segments obliquely flabellate, unequally 2-parted nearly to base. Inflorescence terminal, to 25 cm, many flowered; rachis and pedicels densely spreading yellowish or white pubescent; proximal bracts 3-fid, others lanceolate or linear. Pedicels 1.2--3.2 cm, with 2 bracteoles at middle; bracteoles oblong to linear, 3--7 × 0.5--1.6 mm. Sepals purple, abaxially glabrous; lower sepals oblong; lateral sepals ca. 1.3 cm; upper sepal galeate, ca. 1.6 cm high, short, not clawed, shortly beaked, ca. 1.2 cm from base to beak, lower margin slightly concave. Petals sparsely pubescent; limb ca. 6.5 mm; lip ca. 3 mm; spur incurved, ca. 1 mm. Stamens glabrous; filaments entire. Carpels 5, sparsely pubescent. Follicles erect, ca. 9 mm. Seeds ca. 2 mm. Fl. Aug.
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