20210427 09203100 1.0 TRUE African boxthorn Native to southern Africa, African boxthorn is a spiny shrub introduced to Australia in the mid 1800s as a hedge plant. It has since spread to pastures, neglected areas, roadsides, railways and waterways. African boxthorn produces dense, spiny thickets that can form impenetrable barriers to stock and people. © State of Queensland (Department of Agriculture and Fisheries), 2023 weeds pests Map layer extracted from Biosecurity Queensland pest distribution survey displaying distribution of individual invasive weed species.