Canthium mundianum is also known as the rock-alder or klipels in Afrikaans. It is a shrub or small tree of about 5 m (SA Tree List No. 710). The bark is pale grey, fluted and smooth.
The flowers are small and greenish to yellow. They may either be bisexual or unisexual, occurring on the same plant. The fruit is an ovoid, asymmetric drupe, black when ripe.
The distribution area of this tree is the South African south and east coasts as well as the Mpumalanga and Limpopo Lowveld. The tree is also found in the east of Zimbabwe and over the border in Mozambique (Coates Palgrave, 2002; Van Wyk and Van Wyk, 1997).