The Probert Encyclopaedia of Nature

WATERCRESS

Watercress (Nasturtium officinale) is a perennial aquatic plant of the family Cruciferae, related to the wallflower and widely cultivated as a salad. It is abundant in small streams, and roots in the mud at the bottom. From the creeping stems arise alternate leaves divided into a varying number of pairs of leaflets. The flowers are small and white and clustered together.
Research Watercress