Erica caffra
Erica caffra is a small tree, sometimes a shrub, that grows in riparian habitats and on forest edges and occurs from the Western Cape to the Drakensberg of KwaZulu-Natal and Lesotho. The tree's flowers look like bells. The tree's national tree number is 572. References 

caffra
Flora of the Cape Provinces
Flora of KwaZulu-Natal
Flora of Lesotho
Plants described in 1753
Taxa named by Carl Linnaeus