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Credit
Petasites paradoxus Baumg. Asteraceae Alpine Butterbur. Herbaceous Perennial. Distribution: Temperate Northern hemisphere. It contains pyrrolizidine alkaloids, which are hepatotoxic and cause liver cancers. Photographed in the Medicinal Garden of the Royal College of Physicians, London. Dr Henry Oakeley. Attribution 4.0 International (CC BY 4.0). Source: Wellcome Collection.