Caudex carrot-shaped, to 10 cm, ca. 1 cm in diam. Stem to 2 m, nearly glabrous, many branched; branches sparsely retrorse pubescent. Middle cauline leaves slightly long petiolate; petiole 4--7 cm, sparsely pubescent or nearly glabrous, leaf blade pentagonal, ca. 9 × 9 cm, abaxially sparsely pubescent at veins, adaxially sparsely appressed pubescent, 3-sect; central segment rhombic, apex long acuminate, bipinnately parted nearly to midvein; lobules lanceolate-linear, 1.5--2.8 mm; lateral segments obliquely flabellate, unequally 2-parted nearly to base. Inflorescence terminal, to 60 cm, ca. 55-flowered; rachis and pedicels retrorse pubescent; proximal bracts leaflike, distal ones lanceolate-linear. Pedicels 1--7 cm, with 2 bracteoles above middle; proximal bracteoles leaflike, distal ones linear to subulate, 4.5--10 mm. Sepals blue, abaxially glabrous or curved pubescent; lateral sepals ca. 9 mm; upper sepal navicular-galeate, ca. 1.4 cm high, shortly beaked, ca. 1 cm from base to beak, lower margin oblique upward; lower sepals ca. 0.8 mm. Petals glabrous, claw sparsely pubescent; limb ca. 6 × 2 mm; lip ca. 3 mm, slightly concave at apex; spur subglobose, ca. 1 mm in diam. Stamens glabrous; filaments entire. Carpels 4, glabrous. Fl. Jul.