Some case studies of Acacia as weeds and implications for herbaria

Abstract

A context for Australian Acacia species (wattles) as weeds is provided, both overseas and within Australia. Specific case studies from the western Victorian coast between Queenscliff and Torquay are used to illustrate some of the problems and challenges provided by weedy acacias, including confusion between indigenous and introduced species. Four species, one indigenous (Acacia uncifolia) and three introduced (A. cupularis, A. cyclops and A. rostellifera), are described and the reasons for their occurrence in the study area are investigated. Some key factors for the success of acacias as weeds are outlined. Possible implications for the future role of herbaria in assisting land managers to resolve weed issues are discussed and predictions about the changing role of herbaria in relation to weed issues are made.