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jbi12274-sup-0001-AppendixS1.docxWord document22KAppendix S1 List of the herbaria and online databases used for collating the occurrences of spotted knapweed (Centaurea stoebe) in Europe and North America from 1831 to 2010.
jbi12274-sup-0002-AppendixS2.docxWord document46KAppendix S2 Eigenvectors (loadings) of the principal components analysis (PCA).

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