Stem ca. 1.4 m tall, glabrous proximally, very sparsely puberulent distally, branched. Leaf blade 10--12 cm wide, base cordate; primary lobes separate for at least 60% of blade radius; central lobe rhombic or rhombic-obovate, 3-lobulate, distally incised, apex acuminate; ultimate lobules oblong-linear; proximal leaves withered. Corymb 2--8 cm in diam., 2--5-flowered; bracts 3-lobed. Pedicels 2--3.5 cm, densely pubescent; bracteoles borne near middle of pedicel, subulate, 2--3.5 mm. Sepals blue-purple, abaxially appressed puberulent; spur subulate, 1.7--2.2 cm, straight or slightly recurved, base ca. 2.5 mm in diam.; other sepals 2--2.2 cm. Petals 2-lobed, glabrous. Staminode limb elliptic, 2-lobed, yellowish barbate. Filaments glabrous. Carpels 4 or 5; ovaries pubescent. Fl. Aug--Sep.
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