Stem ca. 1.2 m tall, sparsely hispidulous proximally and glabrous distally, or hispid proximally and sparsely puberulent distally, shortly branched distally. Leaf blade 11--19 cm wide, base cordate; primary lobes separate for at least 60% of blade radius; central lobe rhombic, 3-lobulate, distally unequally few lobulate, apex long acuminate; ultimate lobules lanceolate; proximal leaves usually withered. Raceme 20--28 cm, 20--40-flowered, glabrous or yellow glandular puberulent; proximal bracts leaflike, distal ones subulate. Pedicels 3--7.2 cm, yellow glandular puberulent throughout or only distally; bracteoles subulate, 7.5--9.5 mm. Sepals blue or white, abaxially sparsely glandular puberulent; spur subulate, 1.5--2.1 cm, base 2--3 mm in diam.; other sepals 1.1--1.5 cm. Petals obtuse or emarginate, glabrous. Staminode limb ovate, 2-lobed, yellow barbate. Filaments glabrous. Carpels 3, glabrous. Fl. Jul--Aug.
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