Nymphoides crenata Kuntze

A herb which grows in water. It keeps growing from year to year. The stems are 2 m logn and float. They have stolons or runners. The leaves are the base are 3-15 cm long and broadly oval. They are on long stalks. The leaves are deeply heart-shaped at the base. They are bright green and shiny above but can be dull and waxy underneath. There are rounded teeth along the edge. The stem leaves are smaller. The flowering stalks can have a few or many flowers. The flowers are about 3.5 cm across. They are yellow. They have 4-5 lobes. There is a fringe around the edges. The fruit is a capsule 0.5-1 cm across. It has a short beak. There are many straw coloured seeds about 0.6-1.2 mm long. They are smooth and shiny.

It is a tropical plant. It grows in slow flowing water about 1.5 m deep. Plants root in the mud. It needs warm climates and plenty of sun. It suits hardiness zones 9-11.

The small round tubers are roasted and eaten.

Plants can be grown from seed or dividing the stem runners.