fever tree

noun3

1. •
   Any of various shrubs or trees used to treat fever.
2. •
   An acacia tree of species Vachellia xanthophloea, native to eastern and southern Africa, with fragrant yellow flowers.

   • Goodbye. I am going to the great grey-green, greasy Limpopo River, all set about with fever-trees, to find out what the Crocodile has for dinner. — 1912
3. •
   Georgia bark; any member of the species Pinckneya bracteata (syn. P. pubens), principally of Georgia and northern Florida in the US.