PILOCARPUS. 



193 



different varieties of jaborandi, and they arc usually 

 somewhat wrinkled; over the region of the nerves the 

 walls of the epidermal cells are at times richly pored; 



1W)WA 



Fio. 50. — Jaborandi in Powder. 

 Epi, Epidermis of upper surface: above, cross-section; below, 

 surface view; E, epidermis of under surface: above, from inside; b(U)w, 

 surface view; Ea, epidermis over mid nerve; P, palisade tissue -leaf 

 mcsophyll; H, hairs; C, crystals; V, spiral vessels; T, trachcids; Fib, 

 fibres; S, stone cells of i>etioles; O, oil gland. 



the outer cutinized wall is, on the average, thicker in the 

 official leaves. 



The stomata vary in the various species; they are 

 confined to the lower epidermal surfaces. 



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