- any of several trees that produce or are believed to produce a febrifuge, as the blue gum, which is believed to prevent malaria.
- a small tree, Pinckneya pubens, of the madder family, native to the southeastern U.S., having a bark used as a tonic and febrifuge.
- any of several trees that produce a febrifuge or tonic, esp Pinckneya pubens, a rubiaceous tree of SE North America
- a tall leguminous swamp tree, Acacia xanthophloea, of southern Africa, with fragrant yellow flowers
