Stem 15--35 cm tall, puberulent or glabrescent, usually 1-branched. Leaf blade 3--4 cm wide, base deeply cordate; primary lobes separate for at least 90% of blade radius; central lobe rhombic, 3-cleft, distally few lobulate, apex long acuminate; ultimate lobules linear or triangular; proximal leaves withered. Corymb 4--9 cm, 2--4-flowered; bracts leaflike. Pedicels 4--8 cm, appressed puberulent; bracteoles distal, lanceolate, 0.8--1.2 cm. Sepals blue-purple, abaxially sparsely puberulent; spur subulate, 2.1--2.4 cm, base 2.5--3 mm in diam.; other sepals 1.8--2.3 cm. Petals emarginate, glabrous. Staminode limb elliptic, 2-cleft, yellow barbate. Filaments glabrous. Carpels 3; ovaries densely pubescent. Fl. Aug--Sep.
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