ZANTEDESCHIA AETHIOPICA GENERAL DESCRIPTION Scientific name with author Zantedeschia aethiopica (L.) Spreng. Plant photo – live plant Synonyms Richardia africana; Calla moschata. Family Araceae Vernacular/ traditional/ regional names Aronskelk, varklelie, varkblom (Afrikaans); common arum lily, calla lily (English); nyiba, nyibiba, nyuba (Pondo); mithebe (Sotho); inyiba, inyibiba, inyuba (Xhosa); intebe, ihlukwe (Zulu) Botanical description Zantedeschia aethiopica is a tufted, robust, perennial herb of up to 1 metre in height, with large, fleshy leaves developing from a tuberous rhizome. The leaves are hairless, glossy and dark green, with a spongy, thick stalk. The numerous, tiny yellow or cream-coloured flowers are borne in a dense group and arranged in a complex spiral pattern on a finger-like column called a spadix. The spadix is surrounded by a white conspicuous spathe (a large, white leaf-like structure). A dense mass of small, yellow, fleshy, berry-like fruits develop at the base of the spadix. Reference Hutchings, A., Scott, A.H., Lewis, G. and Cunningham, A.B. (1996). Zulu Medicinal Plants: an inventory. Natal University Press, Pietermaritzburg. Geographical distribution Z. aethiopica occurs in large parts of South Africa. It is exceptionally widespread and forms large colonies in wet or seasonally wet areas ranging from the coast to an altitude of 2250m. Distribution map ETHNOBOTANICAL INFORMATION Medicinal uses The washed and heated leaves are widely used as a dressing for wounds, boils, minor burns, insect bites, stings and sores. Gout and rheumatism sufferers use a warmed leaf dressing as a poultice to ease the pain. The leaves are also traditionally used as a treatment for headaches. Pounded rhizome, used as a poultice, is an old Cape remedy for inflamed wounds. Traditionally the plant is boiled and eaten. Boiled rhizomes, mixed with honey or syrup, are taken for asthma, bronchitis, heartburn and rheumatism or gargled for a sore throat. Raw plant material causes swelling of the throat because of microscopic, sharp calcium oxalate crystals. References Roberts, M. (1990). Indigenous healing plants. Southern Book Publishers, South Africa. Rood, B. (2008). Uit die veldapteek. Protea Boekhuis, Pretoria. Watt, J.M. and Breyer-Brandwijk, M.G. (1962). The medicinal and poisonous plants plants of southern and eastern Africa. 2nd ed. Livingstone, London. Wink, M. and van Wyk, B.-E. (2008). Mind altering and poisonous plants of the world. Briza, Pretoria. QUALITY STANDARDS Macroscopial Z. aethiopica, a tufted, evergreen herb with tuberous rhizomes, grows from 0.6-1 metre but may get taller in the shade. It has lush looking dark green leaves with an arrow head shape. The size varies according to the amount of shade. The flowers appear in a main flush from August to January. The striking arum lily is actually many tiny flowers arranged in a complex spiral pattern on the spadix. The tiny flowers are arranged in male and female zones on the spadix. The top 7 cm are male flowers and the lower 1.8 cm female. If you look through a hand-lens you may see the stringy pollen emerging from the male flowers which consist largely of anthers. The female flowers have an ovary with a short stalk above it, which is the style. The spadix is surrounded by the white or coloured spathe. The whiteness of the spathe is not caused by pigmentation, but is an optical effect produced by numerous airspaces beneath the epidermis. The flowers are faintly scented and this attracts various crawling insects and bees which are responsible for pollinating the flowers. Cross pollination occurs as the anthers of each flower ripen before the ovaries. The spathe turns green after flowering and covers the ripening berries. It rots away when these are ripe and the succulent yellow berries attract birds. The leaves of the arum contain water stomata which can discharge excess water by guttation. References Hutchings, A., Scott, A.H., Lewis, G. and Cunningham, A.B. (1996). Zulu Medicinal Plants: an inventory. Natal University Press, Pietermaritzburg. South African National Biodiversity Institute. (2001). Zantedeschia aethiopica (L.) Spreng. http://www.plantzafrica.com/plantwxyz/zantedeschaeth.htm Microscopial CHEMICAL CONSTITUENTS Chemical constituents – compounds diagrams Chemical constituents – compounds description The whole plant contains more than ten phenylpropanoids such as 3-(3,4-dihydroxy-phenyl)-1,2propanediol, two cycloartane triterpenoids (24-methylene cycloartenol and cycloartenol), three lignans and ten sterols. A major compound in leaves is α-linolenic acid. Insoluble calcium oxalates are present. Chemical constituents – organoleptic properties The flowers are faintly scented. Fruits are succulent yellow berries. Chemical constituents – TLC / HPLC / GC Chemical constituents – NIR Spectroscopy image Chemical constituents – NIR Purity tests / Requirements TLC and HPLC are used. Assay Not yet available. USAGE Plant part used The leaves are mainly used, rarely the rhizomes. Plant part used photograph Dosage forms The fresh leaves are warmed and applied directly as plasters to the affected part. A large leaf is bound around the head and used as a headache poultice. Boiled rhizomes, sweetened with honey or syrup, is taken for asthma, bronchitis, rheumatism and heartburn or gargled for sore throat. A poultice, made from pounded rhizomes, is used for inflamed wounds. Fresh plant parts contain microscopic, sharp, needleshaped calcium oxalate crystals and should be not eaten fresh. References Roberts, M. (1990). Indigenous healing plants. Southern Book Publishers, South Africa. Wink, M. and van Wyk, B-E. (2008). Mind altering and poisonous plants of the world. Briza, Pretoria. Pharmacology/ bioactivity Rhizome, stem and leaf extracts are reported to show some antibiotic action. Insoluble, microscopic calcium oxalate crystals calcium oxalates are present and ingestion of fresh plant parts causes swelling of the throat and tongue. Z. aethiopica produces toxic effects in rabbits. These range from hypoaesthesia to paralysis. The triterpenoids and sterols may have pharmaceutical relevance as anti-inflammatory agents, but wound healing is more likely due to protective sealing and moisturising of the wound rather than any chemical reactions. References Hutchings, A., Scott, A.H., Lewis, G. and Cunningham, A.B. (1996). Zulu Medicinal Plants: an inventory. Natal University Press, Pietermaritzburg. Van Wyk, B.-E. and Gericke, N. (2007). People’s plants: a guide to useful plants of southern Africa. Briza, Pretoria. Contraindications Adverse reactions Ingestion of fresh plant parts causes swelling of the throat and tongue due to microscopic, sharp calcium oxalate crystals. Reference Wink, M. and van Wyk, B-E. (2008). Mind altering and poisonous plants of the world. Briza, Pretoria. Precautions Do not consume raw plant material. Dosage and preparation The large, fresh leaves are warmed and then placed directly on wounds, boils and sores. Boiled rhizomes, sweetened with honey or syrup, is taken for asthma, bronchitis, rheumatism and heartburn or gargled for sore throat. A poultice, made from pounded rhizomes, is used for inflamed wounds. Traditionally the plant is boiled and eaten. Plant parts contain needle-shaped calcium oxalate crystals and should be not eaten fresh. To do so causes swelling of the throat and tongue. References Roberts, M. (1990). Indigenous healing plants. Southern Book Publishers, South Africa. Watt, J.M. and Breyer-Brandwijk, M.G. (1962). The medicinal and poisonous plants plants of southern and eastern Africa. 2nd ed. Livingstone, London. Source Reference Van Wyk, B-E., van Oudtshoorn, B. and Gericke, N. (2009). Medicinal plants of South Africa. 2nd ed. Briza, Pretoria.
© Copyright 2024