PLATE 62 



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A. Cross-section of calamus rhizome' (Aconis calamus, L.). i, Intercel- 

 lular space; 2, Parenchyma cells; 3, Secretion cavity. B. Cross-section of 

 white pine bark {Pinus strobus, L.). I, Parenchyma; 2, Secretion cavity; 

 3, Secretion cells. 



