Corydalis chinensis, Herbs, annual, glaucous, 20-50 cm tall, with thin taproot. Stems leafy, branched. Basal leaves long petiolate; blade pale abaxially, green adaxially, nearly deltoid, 5-9 cm, pinnate to bipinnate; once lobed blades 2 or 3 pairs, shortly petiolulate; twice lobed blade nearly sessile, obovate, pinnately lobate; segments narrowly ovate, apex obtuse, nearly mucronate. Cauline leaves like basal leaves. Raceme distantly 3-10-flowered; bracts narrowly ovate to lanceolate, apex acuminate, margin entire, sometimes upper bracts distant with teeth, ca. equal to pedicels or slightly longer. Pedicel ca. 5 mm. Sepals nearly orbic- ular, small, ca. 1.5 mm, dentate. Flowers pink to amaranth, flat. Outer petals broad and flat, apex retuse, without crest; upper petal 1.5-2 cm; spur cylindric, base slightly downcurved, ca. 1/3 as long as petal; nectary long, ultimately nearly extended to spur, most adhering on spur, nectary end not narrow; lower petal near base attenuate; inner petals crested; claw slender, slightly longer than petal lobes.