HORTICULTURE IX RELATION TO MEDICINE. 59 



date probably have to be cultivated to meet the demand. From a few 

 experiments made in my own garden, it is evident that many of them 

 could be grown in this country, such as cascara sagrada (Bhamnus 

 Purshiana, DC), podophyllum, sanguinaria, hydrastis, &c. ; whilst 



Fig. 14. — Native collecting Opium from Poppy-heads. 



others, like American ginseng (Panax quinqucfolium, Linn.), require 

 special horticultural treatment, as indicated by the high price of the root 

 (30s. per pound) that at present rules in the market. 



But the cultivation of the medicinal plants used in allopathic practice, 

 and official in modern Pharmacopoeias all over the world, is now carried 



