An annual or biennial herb found naturalised in arable fields, and occurring as a casual on waste ground. It arises from wool shoddy and grain. Lowland.
R. phyteuma was cultivated in Britain by 1752 and was recorded from the wild by 1907 (Surrey). It persisted for 30 years in a cornfield in E. Kent, but the species has now declined.
Native of S. Europe and the Mediterranean region.
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