The Giant Calla Lily, Zantedeschia aethiopica, has white blooms with handsome green foliage. Ideal as houseplants or in patio containers. The flower is trumpet like in form and has a waxy texture. Calla Lilies are also know as pig lilies. The Calla Lily has sword-shaped leaves which are formed at the end of celery-like stalks. The leaves are heart-shaped and are a rich, dark green color that may be speckled. The Calla Lilly makes an excellent cut flower and is not cold hardy.