Caudex narrowly obconical, ca. 6.8 cm, ca. 2.2 cm in diam. Stem ca. 1 m tall, apically branched, glabrous. Proximal cauline leaves withered at anthesis, middle ones long petiolate; petiole 5.2--10 cm, glabrous; leaf blade reniform-pentagonal, ca. 11 × 14 cm, abaxially glabrous, adaxially sparsely appressed pubescent, 3-parted; central lobe rhombic; lateral lobes obliquely flabellate, unequally 2-parted. Inflorescence terminal, 14--18 cm, 8--12-flowered; rachis and pedicels glabrous; proximal bracts leaflike, distal ones elliptic. Pedicels 2--5.2 cm, with 2 bracteoles at middle or above, glabrous; bracteoles broadly ovate, 6--12 × 4--8 mm, 3-lobed, others obovate-elliptic or spatulate. Sepals blue, abaxially glabrous; lower sepals 1.5--1.7 cm; lateral sepals 1.8--2.2 cm; upper sepal galeate, 2--2.7 cm high, shortly beaked, lower margin slightly oblique upward, suberect, 2--2.5 cm. Petals glabrous, subequaling sepal; lip ca. 6 mm, slightly concave; spur incurved, ca. 3 mm. Stamens glabrous; filaments 2-denticulate. Carpels (3--)5, glabrous. Fl. Aug--Sep. 2n = 16*.
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