Cardamine lyrata, known commonly as Japanese cress and Chinese ivy, is a species of aquatic plant in the mustard family.

It is native to the marshes of eastern China and Siberia, as well as Korea and Japan.

It needs a supply of cool, slow-moving water and strong light.

It can grow rapidly under the right conditions and makes an attractive, bushy plant.

It propagates easily by cuttings and high levels of carbon dioxide speed growth.