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Lance-leaved Coreopsis
Widely naturalised in eastern Australia (i.e. in south-eastern Queensland, many parts of New South Wales, ACT, and some parts of Victoria). It is also reported to be naturalised on roadsides between Perth and Albany in south-western Western Australia.
Naturalised overseas in Argentina, northern China, New Zealand, South Africa, and beyond its native range in south-western USA (i.e. California and Colorado).
Coreopsis (Coreopsis lanceolata) is regarded as an environmental weed in New South Wales and Queensland, and a potential weed or "sleeper weed" in other parts of the country. This garden escape is listed as a priority environmental weed in one Natural Resource Management region and is commonly found on roadsides, along railway lines and in disturbed areas.
https://keyserver.lucidcentral.org/weeds/data/media/Html/coreopsis_lanceolata.htm
"Coreopsis lanceolata", the Lance-leaved coreopsis, is a North American species of Tickseed in the sunflower family. It is apparently native to the eastern and central parts of the United States and naturalized in Canada, the western United States, Mesoamerica, South America, South Africa, and eastern Asia.
