Calla lily

海芋盛開壁紙

Zantedeschia aethiopica (known as Calla lily and arum lily) is a species in the family Araceae, native to southern Africa in Lesotho,South Africa, and Swaziland.

Zantedeschia aethiopica is a rhizomatous herbaceous perennial plant, evergreen where rainfall and temperatures are adequate,deciduous where there is a dry season. Its preferred habitat is in streams and ponds or on the banks. It grows to 0.6–1 m (2.0–3.3 ft) tall, with large clumps of broad, arrow shaped dark green leaves up to 45 cm (18 in) long. The inflorescences are large and are produced in spring, summer and autumn, with a pure white spathe up to 25 cm (9.8 in) and a yellow spadix up to 90 mm (3 1⁄2 in) long. The spadix produces a faint, sweet fragrance.

Z. aethiopica contains calcium oxalate, and ingestion of the raw plant may cause a severe burning sensation and swelling of lips, tongue, and throat; stomach pain and diarrhea may occur.

Zantedeschia species are rhizomatous herbaceous perennial plants with some species (Zantedeschia aethiopica) growing to 1.2m tall, while Zantedeschia rehmannii does not exceed 60 cm in height, growing in clumps or clusters.

Roots: Contractile, emerging from the top of the tubers in Group II.

Stem: The underground portion is variously described as a thick underground stem (rhizomes or tubers). While the literature is confusing as to the exact terminology, generally the Zantedeschia aethiopica-Zantedeschia odorata group (Group I) is referred to as having rhizomes, and the remaining species tubers. The rhizomes are fleshy and branched.

A Calla lily flower, sometimes known as a bloom or blossom, is the reproductive structure found in plants that are floral. The biological function of a flower is to effect reproduction, usually by providing a mechanism for the union of sperm with eggs. Flowers may facilitate outcrossing or allow selfing. Some flower produce diaspores without fertilization (parthenocarpy). Summer Flowers contain sporangia and are the site where gametophytes develop. Many Nature have evolved to be attractive to animals, so as to cause them to be vectors for the transfer of pollen. After fertilization, the ovary of the flower develops into fruit containing seeds.

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