Click on images to enlarge
dense infestation (Photo: Sheldon Navie)
habit in flower (Photo: Sheldon Navie)
habit in fruit (Photo: Sheldon Navie)
highly-divided lower leaves (Photo: Sheldon Navie)
close-up of highly-divided lower leaf (Photo: Sheldon Navie)
close-up of immature fruit (Photo: Sheldon Navie)
close-up of mature fruit (Photo: Sheldon Navie)
seedling (Photo: Sheldon Navie)
Lepidium bonariense L.
Brassicaceae (Queensland, New South Wales, the ACT, Victoria, Tasmania, Western Australia and the Northern Territory).Cruciferae (South Australia)
Argentine cress, Argentine peppercress, Argentine pepperweed, Argentine pepperwort, birdseed, cut-leaf peppercress, cutleaved peppercress, pepper-cress, peppercress, pepperweed
Native to South America (i.e. Brazil, northern Argentina, Paraguay and Uruguay).
A common and very widely naturalised species that is found throughout the eastern and southern parts of the country. It is most common in southern and central Queensland, New South Wales, the ACT and Victoria. Also naturalised in northern Queensland, south-eastern South Australia, south-western Western Australia, the southern parts of the Northern Territory, on Lord Howe Island and on Norfolk Island.
Argentine peppercress (Lepidium bonariense) is regarded as an environmental weed in New South Wales and Queensland, and as a minor or potential environmental weed in Victoria, Western Australia and the Northern Territory. This species is a common weed of crops, pastures, lawns, gardens, footpaths, parks, roadsides, disturbed sites and waste areas. It also invades native plant communities, particularly woodlands, riparian areas and wetlands in semi-arid regions.
Argentine peppercress (Lepidium bonariense) is a common exotic species in the semi-arid woodlands of New South Wales. It is also listed as an environmental weed in the wider Sydney and Blue Mountains region and in the Goulburn Broken Catchment in Victoria. It has been recorded in conservation areas in both these states (e.g. in Mount Annan Woodland Conservation Area and Berkeley Nature Reserve in New South Wales and Brisbane Ranges National Park and Terrick Terrick East Nature Conservation Reserve in Victoria).
Argentine peppercress (Lepidium bonariense) is also a weed of riparian vegetation in the Burnett River Catchment in Queensland, a weed of granite rocks vegetation and tuart woodlands from Perth to Albany in south-western Western Australia and a potential weed of arid wetlands in the southern parts of the Northern Territory.
Fact sheets are available from Department of Employment, Economic Development and Innovation (DEEDI) service centres and our Customer Service Centre (telephone 13 25 23). Check our website at www.biosecurity.qld.gov.au to ensure you have the latest version of this fact sheet. The control methods referred to in this fact sheet should be used in accordance with the restrictions (federal and state legislation, and local government laws) directly or indirectly related to each control method. These restrictions may prevent the use of one or more of the methods referred to, depending on individual circumstances. While every care is taken to ensure the accuracy of this information, DEEDI does not invite reliance upon it, nor accept responsibility for any loss or damage caused by actions based on it.
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