蛇麻（学名：Humulus lupulus），又音译作忽布（英语hops），因其花序用于酿造啤酒，因此又称作啤酒花。

多年生缠绕草本，具有小刺钩。叶对生，心状卵圆形，多为三裂，边缘有锯齿，上面粗糙；秋季开小型花，雌雄异株，雄花成圆锥花序，雌花成短穗状花序，每两朵雌花外覆一鳞状苞片；果期苞片增大变薄，互相重叠，合成淡黄白色、卵形的球果状体，每个苞片内藏瘦果两个；瘦果外小苞和花被上布满黄色粉状的香脂腺。

植株

雌花序

雄花序

叶

嫩叶至成叶的发展

毬果

成熟毬果

栽植园

Hops are the flowers (also called seed cones or strobiles) of the hop plant Humulus lupulus. They are used primarily as a flavoring and stability agent in beer, to which they impart bitter, zesty, or citric flavours; though they are also used for various purposes in other beverages and herbal medicine. The hop plant is a vigorous, climbing, herbaceous perennial, usually trained to grow up strings in a field called a hopfield, hop garden (nomenclature in the South of England), or hop yard (in the West Country and U.S.) when grown commercially. Many different varieties of hops are grown by farmers around the world, with different types being used for particular styles of beer.