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SCIENTIFIC AND APPLIED PHARMACOGNOSY 



with phloroglucin and hydrochloric acid and with simple trans- 

 verse pores; tracheae chiefly with bordered pores, occasionally 

 reticulate; medullary rays, 2 to 3 cells wide, and in very long rows; 

 starch grains not numerous, occurring in pith and medullary ray 

 cells, single or 2- to 3-compound, the individual grains being irregu- 



FIG. 104. Transverse section of Berberis. K, cork; C, cortex; P, parenchyma; 

 Bf, bast fibers; L, leptome; Cam, cambium layer; W, wood fibers; T, 

 trachea*; M, medullary ray cells; S, starch grains. Drawing by Haase. 



larly spheroidal and from 0.003 to 0.010 mm. in diameter, occasionally 

 larger. 



A powder made from the worm-eaten drug shows upon the 

 addition of iodin solution few or no starch grains, a large number of 



