Cardamine pentaphyllos

Cardamine pentaphyllos, the five-leaflet bitter-cress or showy toothwort, is a flowering plant in the family Brassicaceae, native to Western and Central Europe in Slovenia and Croatia. It is an herbaceous perennial, growing to 30 - 50 cm, with palmate leaves and racemes of purple, pink or white flowers in late Spring and early Summer.

The Latin specific epithet pentaphyllos means "with five-lobed leaves". The feminine form pentaphylla is sometimes seen, but this is deemed incorrect.

This plant has gained the Royal Horticultural Society's Award of Garden Merit.