JABORANDI. PILOCARPUS PENN AT1FOLIUS. 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. 



. 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. 



