20210427 09203100 1.0 TRUE Non-indigenous acacia: knob thorn <DIV STYLE="text-align:Left;font-size:12pt"><P><SPAN><SPAN>Native to western and southern Africa, knob thorn is a drought-resistant, deciduous tree growing to 8-20m. The leaves are round and much bigger than other acacias, and it has sharp, strong, recurved thorns which eventually grow into large spiny knobs. Knob thorn is a prohibited plant in Queensland.</SPAN></SPAN></P></DIV> © 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.