Stem 15--40(--70) cm tall, densely retrorsely puberulent, simple or branched. Petiole densely retrorsely puberulent; leaf blade 2--7 cm wide, base cordate; primary lobes separate for at least 90% of blade radius; central lobe rhombic, 3-lobulate, distally 2 or 3 × dissected, apex acute; ultimate lobules narrowly triangular to linear; proximal leaves usually withered. Corymb 2--7 cm, 2--4-flowered; bracts leaflike. Pedicels 1.7--3.4(--5) cm, densely retrorsely puberulent; bracteoles distal, elliptic or lanceolate, 8--10 mm. Sepals persistent, blue-purple, abaxially puberulent; spur subulate, 1.5--2.2 cm, base 2.5--4 mm in diam.; other sepals 1.3--2.1 cm. Petals 2-lobed, glabrous. Staminode limb rarely blue-purple, 2-cleft, yellow barbate. Filaments glabrous. Carpels 3; ovaries puberulent. Fl. Aug--Sep.
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