Herbs, annual, 30-80 cm tall, with thin taproot. Stems erect to suberect, sulcate, sparingly branched mostly above. Petioles of lower leaves 5-6 cm, upper petioles shorter; blade 4-8 × 3-8 cm, bipinnate; leaflets deeply divided into elliptic, obtuse to subacute lobes. Racemes dense, 10-24-flowered, subsecund; bracts small, dentate or divided throughout inflorescence, or upper ones entire, equaling pedicels. Pedicel 3-4 mm, recurved in fruit. Sepals minute, ca. 0.5 mm, deeply divided. Corolla yellow; outer petals obtuse, with narrow to broad, short or long dentate crests; spur of upper petal slightly upcurved, 3-4 mm, obtuse; nectary ca. 2/3 as long as spur; lower petal without basal pouch; inner petals 4-5 mm. Stigma with narrow sinus, 4 apical stalked papillae, and a pair of geminate papillae close to apex. Fruit linear-oblong, 7-10 × 1-1.5 mm, 3-7-seeded; style ca. 1.5 mm. Seeds in 1 row, 1-1.2 mm. Fl. and fr. Jun-Sep.
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