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Pittosporum viridiflorum

(Cheesewood)

An evergreen tree that can reach 10m and is protcted in South Africa. They occur over a wide range of altitudes and in a variety of habitats. It does occur on the Highveld but is not common.The leaves are simple and a dark green to bluish green, but appear brilliant green when seen against the sun. They are eaten by cattle, goats, grey duiker, kudu, klipspringer, nyala and bushbuck. The cream/yellow flowers open in spring and are sweetly honey scented. They attract a number of insects and therefore also the insect eating birds.The fruits are bright red seeds which are coated in a sticky resin and enjoyed by doves, pigeons, louries, barbets, bubuls and starlings. Guinea fowl and francolin enjoy the fallen fruit. The bark has a sweetish smell, but a bitter taste and it is medicinal as it is used to treat stomach complaints, pain, malaria and fever. The dried bark is taken in beer as an aphrodisiac. It is also used as a protection charm to protect patients from witchcraft. It is frost hardy and requires full sun.Ideal for containers as it does not have aggressive roots. Plant it 3 meters from a building or a pool. The name is derived from the Greek pitta = pitch; spora= seed. The seed is covered in a dark, sticky resin.

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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