The dried strobiles1 of Humulus Lupulus, or hop vine, cultivated in England. They contain an aromatic volatile oil, resins, an acid, and an alkaloid called lupuline.

The former gives a stimulant action, with aftereffects that are sedative and sleep-producing. The latter gives stomachic and tonic qualities. Hops are also slightly astringent. These various characteristics are shown in ales and beers, which are made from hops. The heart action is somewhat strengthened and quickened by hops, and diaphoresis produced.

1 Cones; from the Latin word meaning a pine cone.

Hops are used externally for the relief of pain, either as a means of applying moist heat, when they are put into bags and wrung out of hot water; or as dry heat when - also in bags - they are heated through. Hop pillows may be used as a means of inducing sleep. The crackling of the hops, which may annoy, can be stopped by sprinkling them with alcohol.