Franz Eugen Köhler, Hops, Humulus lupulus, 1883-1914. From the book Medizinal-Pflanzen, Gera, German
Franz Eugen Köhler, Hops, Humulus lupulus, 1883-1914. From the book Medizinal-Pflanzen, Gera, Germany. Source.Cannabaceae is a small family of flowering plants, including cannabis and hop. -- source link
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