JABORANDI. PILOCARPUS PENNATIFOLIUS. 69 



resin-like mass. But the mass does not entirely fill the gland. 

 Occasionally small masses of resin are found scattered through the 

 leaf. 



Fig. 3 shows the epidermal cells from the lower surface of the 

 leaf when magnified 250 diameters. 



tg. J. Epidermis from the lower surface, of the leaf. Magnified 



250 diameters. 



COMPOSITION. 



The dried leaves have no particular odor when unbroken, but 

 they have a perceptible aromatic odor when broken. Martin- 

 dale says the odor " resembles a mixture of Indian hemp, matico 

 and cubebs." The taste is feeble at first, but on chewing it 

 is somewhat aromatic and bitter. At first it produces a warm, 

 tingling sensation in the mouth, accompanied by an increased flow 

 of saliva. The bark has a similar taste and odor as the leaves, but 

 is more pungent. Rabuteau, who has experimented considerably 

 with the leaf, believes the odor is due to a volatile principle, but 

 not analogous to the essential oils contained in -aromatic plants; 

 and the bitter taste to a principle soluble in water and alcohol. 

 Since then Gerrard and Hardy have proved the presence of an al- 

 kaloid, which they have proved possesses well-marked chemical and 

 physiological properties. It is soluble in water, alcohol and 

 chloroform. This alkaloid is regarded as the active principle 

 of Jaborandi, and has been named Pilocarpine or Pilocarpia. 



