Rorippa is a flowering plant genus in the mustard family, Brassicaceae, native to Europe through central Asia, Africa, and North America. Rorippa species are annual to perennial herbs, usually with yellow flowers and a peppery flavour. They are known commonly as yellowcresses. Rorippa formerly included several species of watercress, now placed in ... Found on http://en.wikipedia.org/wiki/Rorippa