Stem 0.5--1.6 m tall, glabrous, branched distally. Leaf blade 8--12 cm wide, base cordate; primary lobes separate for at least 75% of blade radius; central lobe rhombic, 3-cleft, distally lobulate and dentate, apex acute; ultimate lobules narrowly ovate; proximal leaves usually withered. Raceme 12--38 cm, 8--25-flowered, yellow glandular puberulent; proximal bracts leaflike, distal ones linear or filiform. Pedicels 1.8--7 cm; bracteoles distal, subfiliform, 4--7 mm. Sepals blue-purple, abaxially sparsely puberulent; spur subulate, 1.5--2.4 cm, base 3--3.5 mm in diam.; other sepals 1.1--1.8 cm. Petals emarginate, glabrous. Staminode limb suboblong, 2-cleft, yellow barbate. Filaments glabrous. Carpels 3; ovaries sparsely puberulent. Fl. Jul--Aug.
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