Occurs in the Transvaal, Swaziland and Natal. This small, mutistemmed tree grows to about 5 m in the sun or semi shade in the dry woodlands on rocky slopes. It’ s a protected tree in South Africa with glossy green leaves that have a strong citrus smell when crushed, the thorns are straight and brown and fade to grey on cone shaped protuberance when old. The flowers are white/green and are sweetly scented. They attract insects and insect eating birds. It is both drought and frost hardy. The citrus swallowtail larvae, White-banded Swallowtail, Green-banded Swallowtail and the Emperor Swallowtail feed off the leaves while the fruit is eaten by birds, monkeys and baboons. The leaves are browsed by kudu, klipspringer and grey duiker. The fruit is chewed for stomach aches, colic, flatulence, cramps and pain. Crushed leaves are made into a tea which is drunk for stomach upsets, diarrhoea, cramps and intestinal worms. The crushed leaves of Artemesia afra and the Knobwood were used during the 1918 Flu epidemic and made into a strong tea. It is used for colds, flu, coughs and a gargle.The bark is used for snake bite and gall-sickness in cattle and the twigs are used as toothbrushes. The crushed seeds are used as perfume. Pounded bark is made into a tea and drunk for blood conditions and also applied to skin eruptions, snake bite and toothache. The wood is yellow and is used for implements and walking sticks which are considered to be a protective charm. The leaves can be left in oil in a warm place for 4 days. This is used to massage tired feet. The pungent leaves can be added to pot-pourri or used with Artemesia leaves to make an insect-repellant pot-pourri. Itt is useful for containers as it has non aggressive roots.