Hops are the flowers (also called seed cones or strobiles) of the hop plant Humulus lupulus,[1] a member of the Cannabaceae family of flowering plants.[2] They are used primarily as a bittering, flavouring, and stability agent in beer, to which, in addition to bitterness, they impart floral, fruity, or citrus flavours and aromas.[3] Hops are also used for various purposes in other beverages and herbal medicine. The hops plants have separate female and male plants, and only female plants are used for commercial production.[4] The hop plant is a vigorous, climbing, herbaceous perennial, usually trained to grow up strings in a field called a hopfield, hop garden (in the South of England), or hop yard (in the West Country and United States) when grown commercially. Many different varieties of hops are grown by farmers around the world, with different types used for particular styles of beer.
The first documented use of hops in beer is from the 9th century, though Hildegard of Bingen, 300 years later, is often cited as the earliest documented source.[5] Before this period, brewers used a "gruit", composed of a wide variety of bitter herbs and flowers, including dandelion, burdock root, marigold, horehound (the old German name for horehound, Berghopfen, means "mountain hops"), ground ivy, and heather.[6] Early documents include mention of a hop garden in the will of Charlemagne's father, Pepin the Short.[7]
Hops are also used in brewing for their antibacterial effect over less desirable microorganisms and for purported benefits including balancing the sweetness of the malt with bitterness and a variety of flavours and aromas.[3] It is believed that traditional herb combinations for beers were abandoned after it was noticed that beers made with hops were less prone to spoilage.[8]
^"University of Minnesota Libraries: The Transfer of Knowledge. Hops-Humulus lupulus". Lib.umn.edu. 13 May 2008. Archived from the original on 5 March 2012. Retrieved 20 May 2012.
^ abSchönberger C, Kostelecky T (16 May 2012). "125th Anniversary Review: The Role of Hops in Brewing". Journal of the Institute of Brewing. 117 (3): 259–267. doi:10.1002/j.2050-0416.2011.tb00471.x.
^Willy H. Verheye, ed. (2010). "Hops and Hop Growing". Soils, Plant Growth and Crop Production Volume II. EOLSS Publishers. p. 194. ISBN 978-1-84826-368-0.
^Hornsey, Ian S. (2003). A History of Beer and Brewing. Royal Society of Chemistry. p. 305. ISBN 9780854046300.
^"Understanding Beer – A Broad Overview of Brewing, Tasting and Analyzing Beer – October 12th, 2006, Beer & Brewing, The Brewing Process". www.jongriffin.com. Jongriffin.com. Archived from the original on 15 March 2012. Retrieved 20 May 2012.
^Michael Jackson (1988). The New World World Guide to Beer. Running Press. p. 18. ISBN 978-0-89471-884-7.
^F. G. Priest; Iain Campbell (2003). Brewing microbiology. Springer. p. 5. ISBN 978-0-306-47288-6.
or citrus flavours and aromas. Hops are also used for various purposes in other beverages and herbal medicine. The hops plants have separate female and...
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Aramis Hop - Aramis Hops for sale - Comptoir Agricole". "Bor" (PDF). Hopsteiner. Archived from the original (PDF) on July 6, 2004. "Global Hops – Hops Varieties"...
a hotel's front-desk clerk ringing a bell to summon a porter, who would hop (jump) to attention at the desk to receive instructions. It is short for...
developed a new variety of hops in the area that was a hybrid of Bavarian and Bohemian-Czech varieties of hops. This new variety of hop was very successful and...
or hop kiln is a building designed for kilning (drying) hops as part of the brewing process. They can be found in most hop-growing (and former hop-growing)...
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