Calla, a tropical plant having a showy, bell-shaped leaf. This
leaf, which resembles the flower of a lily, is called the
spathe. It surrounds a column of tiny flowers, called the
spadix. The spathes of cultivated callas are red, yellow, or
rose-red. Because of the shape and color of the spathe, the
plant is sometimes called the calla lily. The water, or bog,
arum is a perennial calla found in swamps and bogs in Europe,
Asia, and eastern North America. It has a white spathe. The
white calla, or arum lily, native to South Africa, is a popular
florist plant. It has a yellow spadix and a large white spathe.
Callas belong to the family Araceae. The water arum is Calla
palustris. The arum lily is Zantedeschia aethiopica.The calla is
a tropical plant with a showy, lily-shaped leaf.