280 



BOTANICAL GAZETTE 



[APRIL 



ones with cell cavity, frequently 150 fi in diameter, about the size of the 

 intercellular cavities, both being conspicuous. The cell walls vary 

 from 8-14 m in thickness and have numerous pits. 



epi r 



~hy( 



St 



X 



mes 



-A— am 



Fig. 



• rrn<;s-section: e P l < 

 —Cucurbita Pepo var. verrucosa Naud. Pericarp in cro* e _ ce |i 



epicarp with /, hair, and sto, stoma; hy, hypoderm; St, outer mesocarP a l w sWrC h. 

 layer) with *, spherical cavity; mes, middle mesocarp with>, bundle, an 



X160. 



4. Middle mesocarp (mes).- 

 consist of rather thick-walled 

 >tarch grains (am). 



middle 



mesocarp 



+ninratcd 



