UVA URSI 



339 



recommended in cystitis, its action being due to the decomposition of 

 arbutin in the system and the excretion of the hydroquinone, which 

 is a powerful disinfectant and antiferment. Dose: 15 to 60 gr. 



(i to 4 Gm.). 



OFFICIAL PREPARATION. 



Fluidextractum Uvae Ursi, . 



Dose: 15 to 60 njj (i to 4 mils). 



FIG. 194. Arclostaphylos uva ursi Branch, flower, and fruiting branch. 



412. ARCTOSTAPHYLOS GLAUCA Lindley. MANZANITO. This is a small 

 California evergreen tree or shrub whose leaves are there highly esteemed as 

 an astringent, like uva ursi. 



413. GAULTHERIA. WINTERGREEN. CHECKERBERRY. PARTRIDGE BERRY. 

 The leaves of Gaulthe'ria porcum'bens Linn<. Habitat: Northern Hemi- 

 sphere. This is a small evergreen shrub, consisting of slender, erect, reddish 

 stems, bare below, leafy at top, rising at intervals from a creeping root to 

 the height of eight or ten inches. Fruit a scarlet-red, berry-like, fleshy 

 capsule. Leaves roundish, oval or obovate, about 37 mm. (i J^ in.) long, on a 

 short pedicel; coriaceous; margin serrate, with a few appressed teeth; some- 

 what revolute at the edges; odor fragrant, especially when chewed; taste 

 aromatic, astringent. The fragrance is due to a volatile oil (413 a). Stimu- 

 lant, astringent, and diuretic. Dose: 15 to 60 gr. (i to 4 Gm.). 



413 a. OLEUM GAULTHERIA. OIL OF WINTERGREEN. A nearly 

 colorless volatile oil, distilled from the fresh leaves, "consisting almost 

 entirely of methyl salicylate, CHsCvHsOs, and nearly identical with 

 volatile oil of betula." The latter, according to Power, is composed 



