Stem 60--95 cm tall, retrorsely hispid or appressed puberulent, simple or branched. Petiole retrorsely hispid or appressed puberulent; leaf blade 7--16 cm wide, base deeply cordate; primary lobes separate for at least 75% of blade radius; central lobe rhombic, 3-cleft, distally few lobulate and dentate, apex acute; ultimate lobules ovate or narrowly so; proximal leaves usually withered. Raceme 12--30 cm, 8--12-flowered, retrorsely strigose and yellow glandular puberulent; proximal bracts leaflike, distal ones linear-lanceolate or linear. Pedicels 1--4 cm; bracteoles borne near middle of pedicel or distally, lanceolate-linear or linear, 6--7 mm. Sepals blue-purple, abaxially puberulent and yellow glandular puberulent; spur subulate, (0.7--)2--2.6 cm, base 2--3 mm in diam.; other sepals (0.4--)1.2--1.6 cm. Petals undivided, acute, glabrous. Staminode limb suboblong, 2-lobed, yellow barbate. Filaments glabrous. Carpels 3; ovaries puberulent. Fl. Jul--Nov.
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