Stem 26--65 cm tall, sparsely retrorsely puberulent, branched. Leaf blade 6--11 cm wide, base cordate; primary lobes separate for at least 90% of blade radius; central lobe rhombic, 3-parted, distally 1-or 2-lobulate, apex acute; ultimate lobules triangular to narrowly lanceolate; proximal leaves withered or not. Raceme 7--12 cm, 2--7-flowered, densely retrorsely puberulent; bracts 3-sect or undivided and linear. Pedicels 3--5.5 cm; bracteoles borne near middle of pedicel, narrowly linear or subulate, 2.5--6 mm. Sepals purple-blue, abaxially puberulent; spur subulate, 1.6--2.2 cm, base 2--2.8 mm in diam.; other sepals 1.2--1.8 cm. Petals undivided, glabrous. Staminode limb obovate, emarginate, yellow barbate. Filaments glabrous. Carpels 3; ovaries densely puberulent. Fl. Aug--Sep.
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