Western Australia, Weeds, Contaminants, Identification, Cirsivm arvense (L.) Scop, Creeping thistle, California thistle.
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Canada thistle, also known as creeping and Californian thistle, is a potential rather than an actual weed in Western Australia. It is native to Europe, Asia and Northern Africa, but has found a home in most temperate and warm temperate regions and is a major weed in a number of countries.
Meadly, G. R. W.
"Weeds of Western Australia - Canada thistle - (Cirsivm arvense (L.) Scop.),"
Journal of the Department of Agriculture, Western Australia, Series 3: Vol. 6
, Article 10.
Available at: https://researchlibrary.agric.wa.gov.au/journal_agriculture3/vol6/iss6/10