In the early part of the 1800's when the settlers were heading from the Cape inland and discovering the area around Kruger National Park, this tree was blamed for their bouts of malaria.
It only grows where there is water on the edge of streams and rivers.
The flowers...
The bark is a yellowish-green.
The bark is covered with very fine yellow powder and they thought that it was this which caused them to be sick. In those days, the name "malaria" was not yet known, but they did get high fevers supposedly from the tree and so called it the Fever Tree.