Eschscholzia californica Cham. Papaveraceae. Californian poppy. Named for German botanist and physician, Johan Friedrich von Eschscholtz (1793-1831). Distribution: North America. Official state flower of California. Contains berberine, considered a potential source for many new medicines, and numerous alkaloids some of which may have mild anxiolytic activity. Photographed in the Medicinal Garden of the Royal College of Physicians, London.

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Eschscholzia californica Cham. Papaveraceae. Californian poppy. Named for German botanist and physician, Johan Friedrich von Eschscholtz (1793-1831). Distribution: North America. Official state flower of California. Contains berberine, considered a potential source for many new medicines, and numerous alkaloids some of which may have mild anxiolytic activity. 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.