Vachellia sieberana (Acacia sieberiana var. woodii)
Flat crown, edible gum, medicinal, bark produces grey dye.
SA Tree No:
This tree occurs in Northern Namibia, Botswana, Zimbabwe, Transvaal, Swaziland and Natal. It is easily identified by its dense, widely spreading foliage, a flattened crown and flaking bark. The fluffy, scented white pompom blooms are conspicuous against the deep green, feathery foliage. The papery bark is exceptionally attractive and peels off in flattish strips, displaying yellow under bark. The bark is highly flammable and sensitive to fire, so perhaps it’s best not to build a braai under it. Legend has it that one should write one’s wishes on a piece of bark and blow it away. This apparently guarantees that your wishes will be fulfilled. The bark shelters insects which are foraged by insect eating birds. The Buffalo Weavers nest in these trees. Pied and Crested Barbets like to make nesting holes in the bark. The bark is also used to create a grey dye. It will remain evergreen in a moist habitat but in cooler or drier parts it is semi or completely deciduous. The paired, white thorns are joined at the base and grow up to 100 mm in length. The light brown pods have a musty or fruity smell and are 100 to 200 mm long. The pods are browsed by game and the Grey Hornbills crack open the pods to eat the seeds but the leaves contain prussic acid which is dangerous to stock. A wonderful nesting and lookout site for many birds, and is a ‘food basket’ for a variety of birds, beetles, bees and other bugs. It is the larval host of the Black-striped Hairtail, Common Scarlet and the Silver-spotted Grey. It is medicinal as an infusion from the roots is used as an antiseptic and a bark decoction is a painkiller. It is also used to wash children who have a fever, stomach ache, acne, gonorrhoea, colds, tapeworms and diarrhea. The leaves are a vermifuge. The wood is used for general timber although easily damaged by insects. It is fasts growing and would make useful firewood and timber. It is often seasoned under water for 6 months to make it more durable. The gum is clear and of a good quality. Soot is added to the gum to make ink.It has been recorded as growing to about 200 years. It has aggressive roots so don't plant it closer than 7 meters from buildings and pools. This is a popular bonsai subject. Branches fall from these trees. All thorn trees drop their thorns so it is not suitable for a lawn. 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.