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Senegalia galpinii (Acacia galpinii)

(Monkey Thorn)

This deciduous tree loses its leaves during the winter and is drought and frost resistant. It has a large rounded crown and is fast-growing as it can reach 25-30 m. The flower buds are purple-red and the creamy white, spike flowers open during September-October. They smell of honey! Reddish to purplish brown pods ripen during February-March. It survives hot and dry conditions and is a stunning tree as a street tree provided there is sufficient space. It is an ideal tree for a big garden. It is grazed and used for shade by giraffe, kudu and elephant. Many birds nest in this tree as it provides protection. We have a pair of grey Hornbill that nest in one on our property. It provides dappled shade on hot summer days, making it an ideal tree for planting on a lawn where some sun can penetrate. Many insects such as bees and wasps visit the flowers so it also attracts insect eating birds. The bark is used for rope and the wood is used for furniture. Mature trunks are rough and the bark often flakes away in rectangular patched. This tree has aggressive roots so don't plant it closer than 8 meters from a building or a pool. Named for Ernest Edward Galpin (1858-1941)a South African botanist and banker. He left 16,000 sheets to the Natural Herbarium and several species are named after him. .

Vachellia hebeclada ( Acacia hebeclada )

(Candle Thorn)

This beautiful, deciduous small tree, 5m is very variable. The flowers are scented and are creamy yellow pompoms that open in spring. It is frost hardy and drought resistant. It should be planted in full sun and is an ideal plant for hedging/screening. The roots are aggressive so it should be planted 5m from buildings and pools. They have been measured at 35 meters deep in Botswana. It attracts birds like the shrikes and robins. . The seed pods stand up along a branch, hence the common name. There are pairs of hooked thorns. They are hard, woody and covered in fine hairs.They and the leaves are eaten by stock and game. In the Kalahari it is a host plant to desert truffles. Named for Rev George Harvey Vachel (1798-1839) a British priest and plant collector. He was chaplain to the British East India company in China where he collected plants. The Motswana call it 'The house of the Lion' as it is favoured by lions as a shade tree. The wood is hard, durable and is used for implements. It is used to treat leprosy and the roots are used for diarrhoea.The roots are also ground, mixed with fat and used as a hair treatment in Namibia. The name is derived from the Greek 'acantha' which means thorns and the Greek 'hebe' which means hairy and 'klados' which is a branch so it refers to a 'hairy branch'.

Vachellia karroo (Acacia karroo)

(Sweet Thorn)

Previously known as Acacia karroo. This very popular deciduous tree is frost resistant, water wise and fast growing in the sun or semi-shade. The bright yellow pompom flowers occur in spring and they are honey scented which attracts insects and they attract insect eating birds. It is favoured by honey farmers. It is also a popular tree for nesting sites. This tree has pairs of straight thorns.The leaves are eaten by mammals, bush babies, rhino, giraffe, eland, kudu, sable, gemsbok, impala, springbok, nyala, and monkeys. I once watched vervet monkeys carefully picking the top 4 leaves off of the branches which could be a prickly affair. They also eat the flowers. The Xhosa use the leaves to feed their goats. This is a useful tree for thorny, security barriers but do remember that it does have aggressive roots so allow 7 meters from a building or a pool. There are a host of medicinal properties using all parts of the tree. The roots are used for infant colic. The gum is used to draw abscesses, splinters and to treat thrush and is also eaten by people, bushbabies and monkeys. It was once exported as Cape Gum. It was also used as glue. Ground bark is used for stomach ache, dysentery, diarrhoea, loss of blood and ailments as a result of sorcery. The thorns are used for heart pains and magical purposes. Crushed roots are mixed with food to treat infant colic. The roots are used to treat body pains, dizziness, convulsions and VD, It is also used as an aphrodisiac. Parts of the tree are also used to kill parasites in fowl runs. The bark is used to tan leather red and it makes strong twine. It makes excellent firewood. The seeds are a coffee substitute. The wood is hard and is used for building, furniture and fuel. Simon van der Stel wrote of the Sweet Thorns in Namaqualand 'These trees are never found except where surface or underground streams run. ' It indicates fertile soil and good grazing. It is useful in a garden as the roots fix nitrogen in the soil. It is the larval host for many butterflies like the Common Hairtail, Black-striped Hairtail, Otacilia Hairtail, Talbot's Hairtail, Black Heart Common Scarlet, Natal-spotted Blue, Thorn - tree Blue, Topaz-spotted Blue, Silver-spotted Grey and the Burnished Opal. This is a popular bonsai subject. Named for Rev George Harvey Vachel (1798-1839) a British priest and plant collector. He was chaplain to the British East India company in China where he collected plants.

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