Stem 50--100 cm tall, glabrous proximally, appressed puberulent distally, simple or 1-branched distally. Leaf blade 6--11 cm wide, base cordate; primary lobes separate for at least 75% of blade radius; central lobe rhombic, 3-lobulate, distally few incised dentate, apex acute; ultimate lobules narrowly ovate or lanceolate; proximal leaves usually withered. Raceme 12--30 cm, (5--)10--20-flowered, appressed puberulent; proximal bracts leaflike, distal ones small, subulate, to 7 mm. Pedicels 1--3 cm; bracteoles distal, subulate, 3.5--8 mm. Sepals blue-purple, abaxially densely puberulent; spur conic-cylindric, 0.8--1.9 cm, upcurved, base 2--3 mm in diam.; other sepals 0.9--1.5 cm. Petals 2-lobed, glabrous. Staminode limb ovate, 2-cleft, yellow barbate. Filaments glabrous. Carpels 3; ovaries sparsely puberulent. Fl. Aug.
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