Hakea sericeae Schrader and H. salicifolia (Vent.) B. L. Burtt. are perennials, which belong to the Proteaceae family. Native to dry tropical zones from South Australia, they became aggressive species, particulary in damaged, dried and windy areas and are now considered invaders in some places of mainland Portugal. With no natural predators, the use of chemical control is the main way to manage these plants but they both show a small foliar area, therefore usually little success has been achieved.