Skotland, C. B. Irrigated Agriculture Research and Extension Center, Washington State University, Pullman, Washington.
Kenny, Stephen T. Irrigated Agriculture Research and Extension Center, Washington State University, Prosser, Washington.
Last reviewed:January 2020
- Cultivation and production
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A plant, Humulus lupulus, belonging to the family Cannabaceae. The hop plant is a rough-stemmed, tall-twining dioecious perennial herb and belongs to the same family as hemp and hackberries. It is propagated by cuttings of underground stems. The male flowers are borne on loose stalks. The anthers burst to produce large quantities of pollen, which is wind-borne. The female flowers occur in a cluster consisting of a compressed central axis that holds many flowers. As the clusters mature, the central axis elongates and papery leaves replace each flower, growing into a conelike structure, which is the hop of commerce (see illustration). See also: Flower; Rosales
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