Sideroxylon inerme

 

Sideroxylon inerme

Family: sapotaceae

Common name: Milkwood

This month we are highlighting Sideroxylon inerme, commonly known as the Milkwood. It is an indigenous South African tree valued for its contribution to biodiversity and its importance in natural and cultivated landscapes. 

Sideroxylon inerme, commonly known as the white milkwood, is a small to medium-sized evergreen tree native to Southern Africa. It features dense, leathery foliage, small greenish-white flowers with a strong scent, and purple-black edible berries. The tree is notable for its hard, fine-grained wood and its use in traditional medicine. It is widespread in coastal and inland forests of southern Africa, including South Africa, Zimbabwe, and Gauteng.

The species is not endangered but enjoys legal protection in South Africa—no milkwood may be damaged or removed. Sideroxylon inerme is remembered for several historic specimen trees, including the 'Post Office Tree' in Mossel Bay and the 'Treaty Tree' in Cape Town, both recognised as National Monuments.

Ecologically, the tree supports various animals, including birds, bats, monkeys, and bush pigs, which feed on its fruit and flowers. Its bark and roots are used to treat a variety of ailments. For propagation, both cuttings and seeds are effective, with seeds being the preferred method. The tree is valued in coastal gardens, making an excellent firebreak and growing well in a range of soils and conditions, provided some protection from direct sea wind.

Key attributes:

Plant Type: Tree

Distribution: Southern Africa (coastal and inland)

Soil: Sandy, clay, loam, brackish

Flowering: Late summer to autumn

Uses: Timber, medicine, edible fruit, firebreak

Status: Protected in South Africa

Milkwoods can provide shade, shelter, and habitat for a variety of organisms. Their presence in gardens and landscapes can also help strengthen connections between cultivated areas and the surrounding natural environment.

As we celebrate indigenous plants, choosing species such as Sideroxylon inerme can be one way of bringing local biodiversity into our gardens while learning more about the plants that form part of our natural heritage.