BUCHU. 215 



mentioned, it appears to increase the secretions of the skin and 

 kidney, and probably stimulates the liver and metabolism 

 generally. In the form of the ammoniated tincture it is used 

 in chronic gout and rheumatism, certainly with much success 

 in some cases. As a constituent of Decoctum Sarsse Com- 

 posituin, not alone, it is given as an alterative in syphilis. 



Buchn Folia Bunnn LEAVES. The dried 

 leaves of : 1. Barosma betulina, Bartling. 2. Barosma 

 crenulata, Hooker. 3. Barosma serratifolia^ Willd. 

 Imported from the Cape of Good Hope. 



Characters, Smooth, marked with pellucid dots at the 

 indentations and apex ; having a powerful odour and a warm 

 camphoraceous taste. 1. About three-quarters of an inch long, 

 con :i< rous, obovate, with a recurved truncated apex and sharp 

 cartilaginous spreading teeth. 2. About an inch long, oval- 

 lanceolate, obtuse, minutely crenated, five-nerved. 3. From an 

 inch to an inch and a half long, linear-lanceolate, tapering at 

 each end, sharply and finely serrated, three-nerved. 



Impurities. Leaves of Emplanum serrulatum (for those of 

 B. serratifolia) ; have no glands. 



Substances resembling Buchu : Senna and Uva Ursi, which 

 have entire leaves. 



Composition. Buchu contains a volatile oil, in the glands 

 or " dots," of a yellowish-brown colour, and the source of the 

 peculiar odour of the leaves ; a camphor, barosma camphor ; a 

 crude oil ; and other substances of less importance. 



J)ose.2Q to 40 gr. 



Preparations. 



1. Infusmn Buchu. 1 in 20. Dose, 1 to 4 oz. 



2. Tinctura Buchu. 1 in 8. Dose, 1 to 4 fi.dr. 



ACTION AND USES. 



The action and uses of buchu closely resemble those of 



Sireira, to the description of which the student is referred. 

 ; is more frequently employed than pareira, its infusion con- 

 stituting an excellent vehicle for saline diuretics. 



Oleum Rutre OIL OP RUE. The oil distilled 

 from the fresh herb of Ruta graveolens. 



