Stem (16--)26--90 cm tall, hispid, simple or branched. Leaf blade 4--14 cm wide, base deeply cordate; primary lobes separate for at least 60% of blade radius; central lobe rhombic, 3-lobulate, distally few lobulate and dentate, apex shortly acuminate; ultimate lobules triangular; proximal leaves withered. Raceme 8--25 cm, 4--25-flowered, hispidulous and yellow glandular puberulent, proximal bracts leaflike, distal ones linear or linear-subulate. Pedicels 1.5--5.5 cm; bracteoles borne at various points on pedicel, usually linear, 1--1.2 cm. Sepals blue-purple, abaxially puberulent; spur subulate, ca. 2.3 cm, U-shaped or spirally curved, base 3--4 mm in diam.; other sepals 1.6--2 cm. Petals undivided, glabrous. Staminode limb suboblong, emarginate to 2-cleft, yellow barbate. Filaments glabrous. Carpels 3; ovaries strigose. Fl. Jul--Oct.
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