nuMULHs — HOP. 



247 



the ovaiT, grows with it after .lowering, and covers the achenium at nui- 

 turity, 



A perennial plant, with annual, anj^ulur, rouf>;h, twinin<>^ stems, which 

 climb to the lu'ij>ht of many feet. Leaves mostly ojipoHito, on lonp;, wind- 

 ing petioles, the smaller ones cordate, the larger 15- or fj-lobed, serrate, 

 veiny, and very ro\igli. Stii)ules, 2 or 4 Ixitween the petioles, cvate, re- 

 flexed, persistent. Stanunate flowers in loose, axillary panicles ; pistillate 

 in catkins of niunerous foliaceous, 

 indjricated, concavci l)racts (>at'h 2- 

 rtowered, formin.Lr. in fruit, mem- 

 branaceous strobiles. The achenium, 

 fruiting calyx, etc., are covered with 

 yellow resinous grains, called hiim/iii. 



Habit (if. — The eommou hop is 

 widely distributed t)ver most tem- 

 ])(>rate regions, growing in thickets 

 without cultivation. It is indigen- 

 ous to North America, being espe- 

 cially conunon in the northern and 

 western portions of the United States. 

 In some sections of the country it is 

 extensively cultivated for use ia brew- 

 ing ale, beei', etc. 



Jarfx Cscd. — The strol )iles — of- 

 ficial name, Humulus — Hops. The 

 glandular powder separated from the 

 strobiles — otHcial name, Luimlinum 

 — Lupulin. — L'niU'tl Slates J'haytna- 

 copam. 



Constiliienti^. — Hops have a pecu- 

 liar ai'omatic, somewhat narcotic odor, 

 and an aromatic, bitter, astringent taste. These properties are more strongly 

 markecl in lupulin that in the strobiles after this h;is been separated from 

 them. Lupulin constitutes from one-tenth to one-sixth the weight of hops, 

 and contains, as its most imi^ortant constituents, volatile oil, a peculiar 

 bitter principle, and an alkaloid having an odor scnnewhat resembling that 

 of conia. The scales of hops from which the lupulin lias been separated 

 possess the same active principles but in smaller proportions. 



IWpnrntumi^. — Of hops : Tinc+ura huniuli — tuictuiv of hops. Of lu- 

 l)uliu : Extractum lupulini fluidum — fluid extract of lupulin ; oleoresina 

 hipulini — oleoresin of lupulin. — United Statrs Phnrmacopd'ui. An infusion 

 of hops is also etiRcient and is often employed. 



Mi'diral J'ropertieti and Uses. — Hops are tonic and sliglitly narcotic. 

 Their tonic influence has been found useful in debiliiy of the digestive 



Fro. ir)5. — Humuhis Lupiilus 



