BRUNO PETRIGLIA / SCIENCE PHOTO LIBRARY BRUNO PETRIGLIA / SCIENCE PHOTO LIBRARY
Hops (Humulus lupulus). These flowers are used in the brewing of beer. The plant is cultivated primarily for this purpose, although it is also used in herbal and folk medicine as a sedative, antibacterial and digestive tonic. The leaves may also be eaten. Photographed at the Dilston Physic Library, Northumberland, UK.
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