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Thursday, August 1, 2013

Violet Tree (Securidaca longepedunculata)

Family Polygalaceae
Securidaca longepeduculata is a slender tree with beautiful flowers. It is a highly regarded medicinal and magical tree, especially by the vhaVenda people of the Limpopo Province where it occurs.
Description

The violet tree is a small to medium-sized tree that grows up to 6 m high, with characteristic pale grey, smooth bark. Leaves are variable in size and shape, alternate, often in clusters or crowded on dwarf spur branchlets which are sometimes spine-tipped. They have very fine hairs when young but they lose them as they mature. Flowers are sweetly scented, in short bunches, pink to purple and are produced in early summer. They are about 10 mm long and are each borne on a long, slender stalk (peduncle). Terminal and axillary sprays are about 30-50 mm long, appearing with the very young leaves. The fruit is round, with a distinctive membranous wing up to 40 mm long, purplish green when still young, becoming pale straw-coloured, and can be seen between April and August.

Conservation Status

Securidaca longipedunculata is a threatened and protected species. The violet tree is used for medicinal purposes and other uses in rural areas. What makes it so threatened is the fact that roots are the target for people using this plant, which makes it difficult for the plant to survive constant harvesting.

Distribution and Habitat

It occurs in the North-West and Limpopo provinces of South Africa and Mozambique, and it is widely distributed in tropical Africa. The violet tree is found in woodland and arid savanna soils.

Name derivation and historical aspects

The generic name comes from a Latin word securis, meaning hatchet, referring to the shape of the nut with its curved membranous wing ; and longipedunculata which refers to the long peduncle.

Ecology

It is very attractive to birds, butterflies and insects especially when in flower.
Uses and cultural aspects of the plant

The violet tree is the most popular of all the traditional medicinal plants in South Africa and is used for almost every conceivable ailment. The roots are extremely poisonous, smell like wintergreen oil and contain methyl salicylate which may partly indicate why they have a wide diversity of uses, such as arrow poison in some parts of Africa including West Africa.

The roots and bark are taken orally either powdered or as infusions for treating chest complaints, headache, inflammation, abortion, ritual suicide, tuberculosis, infertility problems, venereal diseases and for constipation. Toothache can also be relieved by chewing the roots. Mixed roots of the violet tree and dwarf custard apple are used to treat gonorrhea. Powdered roots or wood scrapings are used to treat headache by rubbing them on the forehead, while infusions from the roots are used to wash tropical ulcers. In Limpopo, the vhaVenda people use roots for mental disorders and as protection against children's illness during breastfeeding. It is also believed that many African people use the powdered violet tree roots as a sexual boost for men. The vhaVenda people mix the powdered root with mageu (maize or sorghum beverage) and it is given to a man to drink if he is sexually weak. The bark is used to make soap, fibre for fishing nets, baskets and strong threads that are used to sew bark cloth. In Zimbabwe, the roots are used to treat people who are believed to be possessed by evil spirits, for snakebite as well as for coughs when pounded with water and salt.