Stem 0.5--1.1 m tall, sparsely puberulent, branched, rarely simple. Leaf blade 9--22 cm wide, base cordate; primary lobes separate for at least 60% of blade radius; central lobe rhombic, 3-cleft, distally unequally few lobulate and dentate, apex acute; ultimate lobules linear to narrowly lanceolate; proximal leaves usually withered. Raceme 20--35 cm, many flowered, yellow glandular puberulent and retrorsely puberulent; proximal bracts leaflike or 3-parted, distal ones linear. Pedicels 2.5--8.5 cm; bracteoles distal, narrowly lanceolate, 7--11 mm. Sepals blue-purple, abaxially puberulent and glandular puberulent; spur subulate, conic-subulate, or subcylindric, 1.2--1.8 cm, base 3--4.5 mm in diam.; other sepals 1.3--1.5 cm. Petals emarginate, glabrous. Staminode limb ovate, 2-lobed, yellow barbate. Filaments pilose. Carpels 3; ovaries puberulent. Fl. Jul--Sep.
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