Stem (40--)60--90 cm tall, retrorsely puberulent proximally, glabrous distally, branched. Leaf blade 5--10 cm wide, base deeply cordate; primary lobes separate for at least 75% of blade radius; central lobe rhombic or rhombic-cuneate, 3-parted, distally undivided or 1-or 2-lobulate, apex acute; ultimate lobules narrowly triangular to linear-lanceolate; proximal leaves withered. Raceme 8--38 cm, 3--12-flowered, glabrous to sparsely puberulent; proximal bracts leaflike or undivided, lanceolate-linear, distal ones subulate. Pedicels 1.2--5.5 cm; bracteoles distal, subulate, 3.5--4.5 mm. Sepals blue-purple, abaxially sparsely puberulent; spur subulate, 1.7--2.4 cm, straight or nearly so, base 3--4 mm in diam.; other sepals 1--1.7 cm, sometimes shortly corniculate. Petals undivided, glabrous. Staminode limb obovate, 2-lobed, yellow barbate. Filaments glabrous or pilose. Carpels 3; ovaries densely puberulent. Fl. Aug--Oct.
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