528 



BOTANY AND PHARMACOGNOSY. 



V 



sat^,^T9 



'^^fw^p'^m 



.-:/J,V&_^y V*^,_,/ 



*-?' r-i^iA'iiiX' 





I 



4 



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Fig. 231. Transverse section of cotton root bark: C, cork; Cr, rosette aggregates 

 of calcium oxalate; B, bast; M, medullary rays; T, cells containing tannin; S, sieve. 

 After Morgan. 



