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Senegalia caffra
The Hook-thorn (''Senegalia caffra'') is a tree that occurs commonly in southern Africa. Though it is cultivated, it often occurs naturally in Gauteng suburban gardens, together with ''Vachellia karroo'' and ''Vachellia robusta''.
It is up to 10m tall and may be found in open woodland, grassland, rocky hillsides or watercourses. It occurs in the Transvaal, Swaziland, KwaZulu-Natal, Cape Province and the southern regions of Botswana, Zimbabwe and Mozambique.
==Description==
It has extremely hard, dense and attractive timber, and is only spared from intense exploitation because of its strongly twisted trunk which does not lend itself to long planks, and its tendency to develop heart rot.〔(ProtaBase )〕 The bark is rough, dark grey and flaking, while the strong, paired hooked thorns are a formidable deterrent on young plants. Twigs which may vary in hairiness from densely puberulous to pubescent or tomentose. 〔(''Flora Zambesiaca'' )〕 Due to its variability the species has been described under many names, some being listed below. In common with other ''Acacias'' and ''Senegalias'', the bark and leaves are rich in tannins, while parts of the tree are used by the Bantu in traditional herbal medicine for curing a large range of complaints.
''Senegalia caffra'' is deciduous and older plants are resistant to frost, fire and drought. Its appearance may be confused with that of ''Senegalia ataxacantha'' or with ''Senegalia hereroensis'', though the former has scattered prickles and the latter has more robust prickles. Together with ''Dombeya rotundifolia'' and ''Erythrina lysistemon'', this species is one of the earliest to flower in spring, producing strongly scented flower spikes. 〔''A Field Guide to the Acacias of Southern Africa'' - Lynette Davidson, Barbara Jeppe〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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