BSIP, TH FOTO / SCIENCE PHOTO LIBRARY BSIP, TH FOTO / SCIENCE PHOTO LIBRARY
Evening primrose flowers. Flowers of the evening primrose (Oenothera biennis). This plant has been used medicinally for centuries. Preparations from its roots, bark and leaves can be used to treat whooping cough (pertussis), asthma, digestive complaints and menstrual pain.
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