288 



BOTANICAL GAZETTE 



[ \PRIL 



neck running out to a point. Fig. ij shows the radiating cell cavity 

 in tangential section. 



According to Moeller, 22 cork cells occur here and there below the 

 epicarp. This I find to be true of the young fruit, but at maturity 

 they break through the epicarp, forming the corky ridges or netted 

 thickenings previously mentioned. The cells are small, thin-walled. 

 and radially arranged, forming a dense mass of cork tissue, which. 

 together with the ruptured epicarp, closely resembles lenticels, but no 

 complementary cells are formed. This likeness is very marked in 

 cross-section (fig. 16). 



Stomata (fig. 17, sto), with guard cells of the usual type, are present 

 in the grooves and, • 



less frequently, in 

 the depressions be- 

 tween the corkv 



J 



ridges. The walls 

 of the accompany- 



*y-~ a 



»<■* 



Fig. 15. — Cucumis 



Fig. 16. — Cucumis Melo L. 



cross- 



Melo L. Epicarp in tan- section; epi, epicarp; su, cork; hy, hypoderm; and me , 



gential section. X160. 



mesocarp. X 50. 



In some 



mg cells have few or no pits and are irregularly thickened, 

 instances the whole wall is thickened, while in others large protuber 

 anccs are sent out into the cavity. 



In the depressions and grooves are jointed (three or more c 





11- 



conical hairs up to 375 p in length (/). The diameter at the base is 



dimini 



apex. The thickened walls have additional minute local thickening 



„„«rf„i ^, lc incr. About the hair 



most 



walls. 



guished 



C 



sativus. 



