Corydalis cava, is a species of flowering plant in the family Papaveraceae, native to moist, shady habitats in Europe. Growing to 15 cm to 30 cm, it is a spring ephemeral, with foliage that appears in spring and dies down in summer.
Corydalis cava shows long-spurred flowers which appear in spring. The flowers show color variation, and may be mauve, purple, red, or white. Corydalis cava and some other tuberous species contain the alkaloid bulbocapnine, which is occasionally used in medicine but scientific evidence is lacking in the correct dosages and side effects.