Bolusanthus speciosus, the tree wisteria or Vanwykshout (Afrikaans), is an erect, small tree with spectacular blue to mauve flowers, shaped like those of the garden pea. The tree is deciduous for a short period in spring, multi-stemmed and produces flat, narrow pods at the end of summer and in autumn.
It grows in KwaZulu-Natal, all the northerly provinces of South Africa, those north of the Vaal River and in some neighbouring countries, including Zimbabwe, Namibia, Zambia and Angola.
The habitat is wooded grassland at medium altitudes representing a variety of soil types. The species is not considered to be threatened in its habitat early in the twenty first century.
Leaves and pods are browsed by game (www.plantzafrica.com; Coates Palgrave, 2002; www.redlist.sanbi.org).