20210427 09203500 1.0 TRUE Madras thorn Native to a large region of America (from southern California to Columbia and Venezuela), madras thorn is a fast-growing tree that is generally planted as an ornamental. Uncontrolled populations of madras thorn can form dense thickets and out-compete native vegetation and pasture. Madras thorn is rare in Queensland, possibly restricted to gardens. An opportunity exists to prevent it becoming a serious problem here. To achieve this, madras thorn must not be sold or grown as a garden ornamental anywhere in the state. © 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.