Herbs, perennial, 25-40 cm tall, glabrous. Rhizome short, with crowded small bulbous petiolar bases. Stems slender, with thin erect branches, with 2 or 3(or 4) leaves (if 2, confined to upper part). Radical leaves early withering; petiole 3-15 cm, thin; blade glaucous abaxially, green adaxially, 1-4 × 1-4 cm, biternate; leaflets deeply cleft into oblanceolate lobes. Cauline leaves sessile, 4-8 × 3-5 cm, pinnate with 2 or 3 pairs of pinnae, terminal pinna large; basal pair of pinnae distant from next pair, long stalked in lower leaves (in upper leaves small and stipulelike), ternate; leaflets deeply serrate or cut into acute lobes. Racemes subspicate, 7-15-flowered, 3-9 cm; bracts broadly lanceolate, 7-15 mm, acute, entire (lowermost to 25 mm with a few large teeth). Pedicel erect-spreading, straight, 5-9 mm, thin. Sepals rounded, 3-4 × 3-4 mm, lacerate-dentate. Corolla white. Outer petals with short rounded crest 1.5-2 mm wide, conspicuously overtopping apex; upper petal 20-22 mm; spur straight to slightly downcurved, cylindric or slightly tapering, 11-13 mm, narrow; nectary ca. 1/2 as long as spur; lower petal with a conspicuous pouch ca. 1/3 from base and a smaller pouch close to base; inner petals 8-9 mm. Stigma with 6 marginal simple papillae; geminate papillae lateral and on basal lobes. Immature capsule pendent from straight pedicel, obovoid, 7-8 mm; ovules 6 or 7; style ca. 4 mm. Fl. May.
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