Paterson's Curse, also know as Salvation Jane, is an annual herb which can dominate pastures and natural vegetation in southern Australia. It produces a large amount of seeds which can remain viable in the soil for up to 5 years.
It is toxic to stock and can reduce the productivity of infested pasture.
Source:
Prime Fact 109, August 2006, Paterson's Curse, NSW Department of Primary Industry
NSW Weed Wise 2021, NSW Weed Wise, NSW Department of Primary Industries, accessed 7 January 2022,