XXXVI] 



CYCADEOIDEA 



389 





.«^«->.- -r, , 



y'ar^SM^'^ 



'^''^^'itiH - '^-' '"'' ■'^^ 





>^#i^< ^\ 



.',-^^ " 



t f. 



<**vl 



ST** • ia ' • ^ 







B 

 Fig. 518. Cycadeoidea Gibscmiana. A, secondary xylem of stem; B, secondary 

 phloem and part of the cortex with secretory ducts, a. (A, B, British 

 Museum, 13206.) 



