Herbs, perennial, 10-40 cm tall, glabrous or papillose-scabrid on leaf veins abaxially or very rarely with scattered 1-celled hairs; stems and petioles of radical leaves attenuate to filiform underground base. Storage roots long, attenuate into distinct sometimes branched stalk. Stems few, simple or often with late branches, with 1-4 leaves in upper 1/2. Radical leaves with long thin petiole; blade ternate to biternate or pinnate; pinnae narrowly lanceolate, below with raised parallel veins. Cauline leaves subsessile; blade 2-5 × 2-6 cm, pinnate; pinnae in 2 or 3 pairs, linear, 1-5 cm, sometimes lowermost pinna again cleft to base. Racemes 3-4 cm, at fruiting elongate, 7-15-flowered; bracts lanceolate, deeply pectinate, dentate to entire; upper ones less divided. Pedicels longer than bracts, (5-)10-20(-25) mm, recurved in fruit. Sepals whitish, 0.5-1 × 0.5-2 mm, dentate. Outer petals yellow (rarely purple), often with distinct veins, limb broadly rhombic-acute to shortly acuminate; upper petal 13-17 mm, with narrow to broad crest tapering to both ends, barely reaching apex, often long decurrent on spur; spur straight, cylindric to slightly tapering, 6-9 mm; nectary ca. 1/2 as long as spur; lower petal 7-8 mm with short low crest and slightly dentate margin; inner petals 6-7 mm. Stigma square; 2 marginal median papillae distinct, lateral marginal papillae broad and indistinct; geminate papillae sublateral and terminating well-developed basal lobes. Capsule oblong to narrowly obovoid, 5-10 mm, 2-8-seeded; style 2.5-3 mm. Seeds ca. 1.2 mm, smooth. Fl. and fr. Jun-Aug.
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