262 



RUTACE^E 



273. PTELIA TRIFOLIATA Linne. WATER ASH. Shrub growing in the United 

 States east of the Mississippi. (Root-bark.) It contains berberine. Used 

 as a tonic and antiperiodic, "its mild, non-irritating properties rendering it 

 especially valuable in low fevers attended with gastro-intestinal irritation; 

 this soothing influence causes it to be retained when other tonics would be 

 rejected." Dose of fluidextract : 15 to 30 njj (i to 2 mils). 



FIG. 144. Barosma belulina Branch 

 and flower. 



FIG. 145. Barosma crenulata Flowering branch. 



274. BUCHU. BUCHU 



SHORT BUCHU 



The dried leaves of Barosma Betulina (Thunberg) Bartling and Wendland, 

 known commercially as short buchu, or of Barosma Serratifolia (Curtis), 

 Willdenow, known commercially as long buchu, with which may be mixed not 

 more than 10 per cent, of the stems of the plants or other foreign matter. 



BOTANICAL CHARACTERISTICS. Shrubby plant. The characteristics common 

 to the buchus are opposite leaves, small, simple, coriaceous, dotted with 

 pellucid glands. Flower pink (betulina), white (crenulata), solitary on axil- 

 lary or terminal peduncles. Frmt composed of five follicles, adherent at the 

 axis and dehiscing at the summit. 



HABITAT. Southern Africa, Cape of Good Hope. 



