Herbs, ?biennial, ca. 1 m tall, glabrous. Stems suberect to diffuse, leafy and much branched throughout, often with accessory branches above. Petiole 3-7 cm; blade glaucous abaxially, green adaxially, ovate, 8-20 × 6-12 cm (upper leaves smaller), tripinnate; petiolules long; ultimate leaflets obovate, 2-5-divided into obovate obtuse mucronulate lobes. Racemes several, 6-10 cm, 10-22-flowered; lowest bracts ovate, 7-8 mm, deeply 3-divided; upper ones gradually smaller upward and less divided or entire, apex acuminate. Pedicel 2-4 mm, recurved in fruit. Sepals ovate, ca. 0.5 mm, dentate. Corolla yellow; outer petals subacute with very short obtuse crest clearly overtopping apex; upper petal 25-28 mm; spur gracefully curved, 17-18 mm, very narrow, apex attenuate; nectary ca. 1/3 as long as spur; lower petal 8-9 mm, base saccate; inner petals 7-8 mm. Stigma square with 4 apical papillae, and lateral and basal geminate papillae. Capsule obovoid, 7-12 × 3-4 mm; style ca. 3 mm. Seeds in 2 rows, ca. 1.5 mm, smooth, elaiosome small. Fl. and fr. Jul-Sep.
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