The female cone-like inflorescences oi this vine are composed of scales covered with glandular hairs which produce, among other compounds, the bitter principle which has long been an indispensable ingredient in the brewing of beer. These largescale catkins have been used also in medicine because of their sedative and soporific properties, and as a tonic.
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Edwardson, J.R. Hops—Their botany, history, production and utilization . Econ Bot 6, 160–175 (1952). https://doi.org/10.1007/BF02984875
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