Tarchonanthus camphoratus (camphor bush) foliage (Photo: Abu Shawka)
Geography and distribution
A widespread species, occurring from Saudi Arabia all along the eastern flank of Africa down to South Africa (with a big gap in central Tanzania and northern Zambia). Over most of its range, it is found at 700 - 2,700 m above sea level, but in the far south it can be found as low as 30 m above sea level.
Camphor bush occurs in dry forest in the northern portion of its distribution, but elsewhere it grows in bushland and bushy grassland. It can be locally dominant.
Overview: An evergreen shrub, occasionally growing into a small tree, up to 9 m tall. The rough, fissured bark flakes off in long strips smelling strongly of camphor. Trees are either male or female.
Leaves: Aromatic, usually about 12 × 2 cm, smooth and green above, felted with dense grey or white hairs below.
Flowers: Small and white, in many small flower heads (capitulae) forming leafy sprays that are either male (up to 15 cm long) or female (up to 35 cm long).
Herbarium specimen of Tarchonanthus camphoratus (camphor bush)
Fruits: Minute (about 4.0 × 1.5 mm), with dense, cottony hairs up to 3 mm long, and crowned by the dried flower.
Camphor bush is used in traditional medicine for treating various chest ailments, fevers, coughs, asthma, bronchitis, whooping cough, toothache and chilblains and for unblocking sinuses.
The wood is close-grained, hard and heavy and is used in hut construction, bushmen’s bows and arrow-shafts, and punt poles (used on the Pongola pans in South Africa). It is popular for spear-shafts and walking sticks, and fence posts made from this wood are said to last for thirty years.
In South Africa it has been used for musical instruments, cabinet-work and boat-building. It is popular as firewood, as it will burn while still green.
In the past, camphor bush leaves were chewed with the aim of producing a slight narcotic effect. Leaves are good for cattle to browse, and bees produce a nice honey from camphor bush flowers.
Kew’s research into insect-repellent properties
Traditionally, camphor bush has been used as an insect repellent, its leaves being used as bedding, deposited in granaries or rubbed on the hair to keep away lice. Laboratory tests carried out at Kew have shown that the plant contains substances that adversely affect insects. This research also found that camphor bush contains substances that are toxic to living cells.
Millennium Seed Bank: Seed storage
The Millennium Seed Bank Partnership aims to save plant life worldwide, focusing on plants under threat and those of most use in the future. Seeds are dried, packaged and stored at a sub-zero temperature in our seed bank vault.
Tarchonanthus camphoratus seed
A collection of camphor bush seeds is held in Kew’s Millennium Seed Bank based at Wakehurst in West Sussex.
This species at Kew
Pressed and dried specimens of Tarchonanthus camphoratus are held in Kew’s Herbarium, where they are available to researchers by appointment. The details of some of these specimens, including some images, can be seen online in Kew’s Herbarium Catalogue.
View details and images of specimens
Specimens of camphor bush leaves, wood and bark are held in Kew’s Economic Botany Collection in the Sir Joseph Banks Building, where they are available to researchers by appointment.