Caudex carrot-shaped or fusiform, ca. 7 cm, to 1.5 cm in diam. Stem ca. 1 m tall, retrorse or ± spreading pubescent. Middle cauline leaves shortly petiolate; petiole ca. 3 cm; leaf blade cordate-pentagonal, ca. 9 × 12 cm, herbaceous, abaxially nearly glabrous, adaxially sparsely appressed pubescent, 3-parted; central lobe rhombic, 3-lobed at middle, margin unequally dentate, apex acuminate; lateral lobes obliquely flabellate, unequally 2-parted. Inflorescence terminal, ca. 20 cm, ca. 8-flowered; rachis and pedicels with intermixed spreading and glandular hairs; bracts leaflike. Pedicels 2--5 cm, suberect upward, with 2 bracteoles at middle or above; bracteoles narrowly linear, ca. 6 mm, rarely leaflike. Sepals blue, abaxially pubescent; lower sepals ca. 1.5 cm; lateral sepals ca. 1.7 cm; upper sepal navicular, 2.5--2.7 cm from base to beak. Petals pubescent; limb ca. 9 mm; lip ca. 4.5 mm, 2-lobed at apex; spur decurved, ca. 2 mm. Stamens pubescent; filaments entire. Carpels 3(or 4), pubescent. Fl. Aug.
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