lO 



THE JOURNAL OF PHARMACOLOGY. 



Belladonna Leaf in Powder— Epi, epidermis, to right in transverse section ; to left, superficial 

 view, showing contorted and wavy cell outlines and the wavy markings of the epidermal cells which 

 are quite characteristic; St, stoniata : Hair, simple multicellular hairs; G, glands and glandular 

 hairs ; M, parenchymatic tissue of the mesophyl ; Pr. parenchyma near the veins : vessels of the ribs 

 and delicate fiber like elements ; C, to left, cell filled with crystal sand : to right, rosette shaped 

 crystal ; these last being rare ; O, parenchymatic cell with crystal sand. 



hairs, mesophyl parenchyma, parenchyma of the fibro-vascular bundles, 

 vessels, crystal sand and crystals. 



The epidermal cells are characteristic, they are very wavy and show 

 very delicate wavy markings. The stoniata are slightly elongated and 

 have from three to four neighboring cells about them. The mesophyl 

 parenchyma varies. It is in some places iso-diametric, in others stellate. 

 Large iso-diametric cells imbedded in the mesophyl contain fine crystal 

 sand of calcium oxalate. Larger calcium oxalate crystals of the rosette 

 form occasionally are formed, but these are inconspicuous in the powder. 



The hairs are not diagnostic. They are few in number and come from 

 young leaves, on the petioles or under sides of the chief veins in the older 

 leaves. They are usually simple multicellular hairs. Small glandular 

 hairs with short pedicels are also found. 



The vessels and fibers are few and not characteristic— Z)r«^. dr., 

 April, 1899. 



