Stem 30--50 cm tall, sparsely hispid proximally, glabrous distally, simple. Leaf blade 4--8 cm wide, base deeply cordate; primary lobes separate for at least 75% of blade radius; central lobe rhombic, 3-cleft, distally few lobulate, apex acute; ultimate lobules triangular or linear-lanceolate; proximal leaves not withered. Raceme 5--24 cm, 3--6-flowered, glabrous; proximal bracts 3-parted, distal ones linear. Pedicels 2--8 cm; bracteoles borne at various points on pedicel, linear, 0.6--1.4 cm. Sepals blue-purple, abaxially puberulent, shortly corniculate near apex; spur subulate, 2.7--2.8 cm, slightly recurved, base ca. 4 mm in diam.; other sepals 1.3--1.4 cm. Petals emarginate, glabrous. Staminode limb elliptic, 2-lobed or 2-parted, yellow barbate. Filaments glabrous. Carpels 3; ovaries densely puberulent or glabrous. Fl. Aug.
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