Zantedeschia

Zantedeschia leaf

Zantedeschia lanceolate leaf

Calla lily

Zantedeschia albomaculata at the HUG

Zantedeschia albumaculata LIH

Zantedeschia - Calla Lilly1

Zantedeschia, commonly known as calla lilies, are a genus of flowering plants in the family Araceae. Native to southern Africa, they are known for their distinctive trumpet-shaped flowers and arrow-shaped leaves. The genus is named after Italian botanist Giovanni Zantedeschi. Despite their common name, they are not true lilies from the genus Lilium. Zantedeschia species are popular both as ornamental plants in gardens and as cut flowers.

Description

Zantedeschia species are herbaceous perennial plants, growing from a rhizome. They can reach heights of 1-2.5 feet, depending on the species. The leaves are large, arrow-shaped, and often feature white or silver speckles. The flowers, or spathes, are large, showy, and can be found in a variety of colors including white, yellow, pink, orange, and purple. The spadix, a spike of minute flowers, is surrounded by the spathe, which is often mistaken for a petal.

Species

The genus Zantedeschia includes several species, among them:

• Zantedeschia aethiopica – Known as the common calla lily, it is the most widely cultivated species, famous for its large white flowers.
• Zantedeschia albomaculata – Also known as the spotted calla lily, it features white flowers with small black spots on the leaves.
• Zantedeschia elliottiana – This species is known for its bright yellow flowers.
• Zantedeschia rehmannii – It is distinguished by its pink or violet flowers.

Cultivation and Uses

Zantedeschia species are cultivated worldwide for their ornamental value in gardens and as cut flowers. They prefer well-drained soil and partial shade but can tolerate full sun in cooler climates. Over-watering or poor drainage can lead to root rot, so proper soil preparation is essential. They are also popular in bridal bouquets and floral arrangements for their elegant and sophisticated appearance.

Toxicity

All parts of Zantedeschia plants are toxic to humans and animals if ingested, due to the presence of calcium oxalate crystals. Symptoms of poisoning include irritation of the mouth and throat, nausea, vomiting, and diarrhea. It is important to handle these plants with care and keep them out of reach of children and pets.

Conservation

While some species of Zantedeschia are common and widely cultivated, others are considered rare and face threats from habitat loss and over-collection. Conservation efforts are important to ensure the survival of these species in their natural habitats.