JUGLANS 



161 



2.5 per cent of a crystalline resin; volatile oil, tannin, sugar, and a 

 fixed oil. 



FIG. 70. Juglans. A, transverse section showing cork (K); parenchyma cells (P); 

 parenchyma cells filled with tannin (Tc); rosette aggregates and monclinic 

 prisms of calcium oxalate (Ca) ; stone cells (St) ; sieve (L) ; bast fibers (Bf) ; 

 starch grains (<S); medullary rays (M). B, fragment showing parenchyma 

 cells (P), and rosette aggregates of calcium oxalate (Ca). C, tangential 

 section showing medullary rays (M), sieve (L). D, bast fiber in longitudinal 

 view. E, fragment in longitudinal view showing 4-sided calcium oxalate 

 crystals (Ca) in cells forming a crystal fiber (C/) and adjoining 2 bast fibers. 

 F, characteristic stone cells (St). Drawing by Hogstad. 



Adulterants. The stem bark of Juglans cinerea is sometimes 

 mixed with the drug and is distinguished by the outer surface pos- 

 sessing occasional grayish patches of certain lichens. 



