Stem 70--100 cm tall, retrorsely puberulent proximally, glabrous and branched distally. Leaf blade ca. 8 cm wide, base deeply cordate; primary lobes separate for at least 90% of blade radius; central lobe broadly rhombic-obovate, dissected nearly to midvein, distally entire or 3--5-lobulate, apex acute; ultimate lobules narrowly linear; proximal leaves usually withered. Corymb 4--8 cm, 2--5-flowered; proximal bracts 3-sect, distal ones linear. Pedicels 3.2--7.5 cm, densely retrorsely puberulent; bracteoles borne near middle of pedicel, linear, 4--6 mm. Sepals deep blue, abaxially appressed puberulent; spur subulate, 2--2.2 cm, base ca. 2.5 mm in diam.; other sepals 1.3--1.5 cm. Petals emarginate, glabrous. Staminode limb elliptic, 2-cleft, yellow barbate. Filaments glabrous. Carpels 3; ovaries densely appressed puberulent. Fl. Jul--Sep.
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