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Zantedeschia aethiopica (known as Calla lilyand arum lily) is a species in the family Araceae, native tosouthern Africa in Lesotho,South Africa, and Swaziland.
Zantedeschia aethiopica is a rhizomatous herbaceous perennialplant, evergreen where rainfall and temperatures areadequate,deciduous where there is a dry season. Its preferredhabitat is in streams and ponds or on the banks. It grows to 0.6–1m (2.0–3.3 ft) tall, with large clumps of broad, arrow shaped darkgreen leaves up to 45 cm (18 in) long. The inflorescences are largeand are produced in spring, summer and autumn, with a pure whitespathe up to 25 cm (9.8 in) and a yellow spadix up to 90 mm (3 1⁄2in) long. The spadix produces a faint, sweet fragrance.
Z. aethiopica contains calcium oxalate, and ingestion of the rawplant 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 plantswith 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 GroupII.
Stem: The underground portion is variously described as a thickunderground stem (rhizomes or tubers). While the literature isconfusing as to the exact terminology, generally the Zantedeschiaaethiopica-Zantedeschia odorata group (Group I) is referred to ashaving rhizomes, and the remaining species tubers. The rhizomes arefleshy and branched.
A Calla lily flower, sometimes known as a bloom or blossom, is thereproductive structure found in plants that are floral. Thebiological function of a flower is to effect reproduction, usuallyby providing a mechanism for the union of sperm with eggs. Flowersmay facilitate outcrossing or allow selfing. Some flower producediaspores without fertilization (parthenocarpy). Summer Flowerscontain sporangia and are the site where gametophytes develop. ManyNature have evolved to be attractive to animals, so as to causethem to be vectors for the transfer of pollen. After fertilization,the ovary of the flower develops into fruit containing seeds.
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