Humulus lupulus is a herbacous perennial climber in the hemp family, Cannabaceae family. Commonly known as Hop or Common Hop, this rhizomatous species is deciduous and thus loses its green foliage in the autumn and regrows new leaves in the spring. It is native to Europe but has been introduced to other areas such as North America and Western Asia, it typically grows between 4-6m, climbing using stiff, downward-facing hairs. This species is termed dioecious and thus produces unisexual flowers, containing either male or female reproductive organs. These gendered flowers are produced on individual plants, they are wind pollinated and attractively scented. Popular with butterflies too! Female flowers lead onto cone-shaped fruits, termed hops. This species is commercially cultivated, the fruits are used widely in beer brewing, as a preservative and flavouring agent.