Family: Araceae
Common Name: Bog Arum

This hardy aquatic or marginal perennial grows in the wild on the edges of streams, ponds and lakes in temperate parts of the world. The ovate to heart-shaped leaves grow from the base of the plant, and the wide, white spathes are followed by clusters of red berries. In favorable climates, callas tend to spread and often become escapees from the garden. In fact, it is the only plant known to be fertilized by water snails. Calla should not be confused with the calla lily which is the common name for plants belonging to another genus (see Zantedeschia).

Species

C. palustris is the only species and grows to a height of 20 cm (8 in).

Cultivation

Callas are usually planted in the shallow water at pool edges. Plants need a position in full sun if they are to flower well. Propagate by division of the rhizomes in spring.

Climate

Zone 4 and above.