Definition. - The carefully dried strobiles of Humulus Lupulus L. bearing their natural glandular trichomes.

Description and Properties. - Ovate, about 3 Cm. long, consisting of a thin, hairy, undulating axis and numerous obliquely ovate, membranaceous scales, the upper portion of which is reticulately veined and the lower parallel-veined, glandular, surrounding a subglobular akene; color of the scales greenish, free from reddish or brownish spots, odor aromatic, and taste bitter, aromatic, and slightly astringent. The active and important constituent is -