Stem (10--)30--60(--100) cm tall, puberulent or mixed with yellow, glandular hairs, usually branched. Leaf blade 2--10 cm wide, base cordate; primary lobes separate for at least 75% of blade radius; central lobe rhombic, subpinnately cleft, distally 1-or 2-denticulate, apex acute; ultimate lobules narrowly triangular or narrowly ovate; proximal leaves usually withered. Corymb 3--8 cm, 3--7-flowered; proximal bracts leaflike. Pedicels 3--12 cm; bracteoles distal, spatulate-linear, 0.6--1.4 cm. Sepals persistent, abaxially puberulent; spur cylindric-subulate or subulate, 1.7--3.3 cm, base 2.5--4 mm in diam.; other sepals 1.4--2.5 cm. Petals emarginate, glabrous. Staminode limb ovate, 2-lobed or 2-cleft, yellow barbate. Filaments pilose. Carpels 3; ovaries densely puberulent, Fl. Jul--Sep. 2n = 16*.
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