Herbs, annual or biennial, 15-50 cm tall. Stems erect or ascending, many branched from base, stems and branches ribbed, with many leaves. Leaves all petiolate, lower leaves long stalked, upper ones shortly stalked; petiolar base sheathed; blade glaucous abaxially, triangular-oblong, bipinnate to tripinnate; leaflets opposite; ultimate leaflets cuneate-obovate or oblong, mucronate. Racemes 10-15-flowered; bracts 4-8 mm, divided into acute lobes, or upper ones entire. Pedicel 2-5 mm, rigidly arcuately recurved in fruit. Sepals ca. 0.5 mm, dentate. Petals yellow, sometimes with distinct veins; inner petals tipped with blackish purple; outer petals acute, abaxially with entire narrow crest; upper petal 14-16 mm; spur straight or slightly downcurved, 6-8 mm, slightly tapering toward apex; nectary extended through ca. 3/5 of spur; lower petal 6-7 mm, broadly saccate at base; inner petals 6-7 mm, claw shorter than limb. Stigma square with 4 apical papillae, a pair of lateral geminate papillae and basal geminate papillae on distinct basal lobes. Capsule obovoid, 8-10 × 2-3 mm, 8-16-seeded. Seeds in 2 rows, muricate, ca. 1 mm in diam. Fl. and fr. Jul-Sep.
Home