Acacia xanthophloea Benth - Fever tree (English), Koorsboom (Afrikaans)
 

The fever tree is an attractive, semi-deciduous to deciduous tree approximately 15 to 25 meters tall and has an open, rounded to spreading or flattish crown which is sparsely foliated. The characteristic, almost luminous, lime green to greenish-yellow bark is smooth, slightly flaking, and coated in a yellow powdery substance described by some as sulphurous. If the powdery surface is rubbed away with the finger it will reveal a green bark beneath. Young twigs have a red-brown bark which peels off leaving the twigs sulphur yellow. The long straight white thorns are arranged in pairs and although they are very significant on young trees they often become barely noticeable on mature specimens.

Bright yellow, golden, ball-like flowers which are sweetly scented are borne in clusters on shortened side shoots at the nodes and towards the ends of branches. Flowering occurs from August or September to November. Flowers are followed by the production of yellowish- brown to brown pods which split open to reveal the small hard brown seeds, which may be harvested from January to April.

The genus name Acacia is derived from the greek word acantha meaning spine, thorn or prickle and the species name xanthophloea is derived from the greek words xanthos meaning yellow and phloios meaning bark.