BELLADONNA 



589 



leaves, 0.35 per cent; unripe berries, 0.19 per cent; ripe berries, 0.21 

 per cent ; and seeds, 0.33 per cent. 



Adulterants. The leaves of Scopolia carniolica (Fig. 252) and 

 Phytolacca decandra (Fig. 85) have been recently reported as sub- 



FIG. 250. Different kinds of tracheae. A, transverse section of stem of grape- 

 vine (Vitis vinifera) showing three trachese from the older wood containing 

 tyloses; w, wood fibers; m, medullary rays. The ty loses, or thy lien, are in 

 the nature of ingrowths from the wood fibers and protrude through the 

 adjoining pores, at the end of the season's growth, closing the cavities of the 

 trachese. B, longitudinal section of belladonna root showing a large trachea 

 with bordered pores (t), a trachea with simple pores (s), wood fiber with 

 oblique pores (w) and parenchyma (p) containing starch. C, longitudinal 

 section of phytolacca root showing a trachea with bordered pores (t), trachea 

 with reticulate thickening (r), wood fibers (w) and parenchyma (p) contain- 

 ing starch. D, longitudinal section of scopola rhizome showing the char- 

 acteristic wide, reticulate tracheae and portion of cells of parenchyma con- 

 taining starch. 



stitutes. The leaves of Solanum nigrum have been substituted for 

 true Belladonna. 



