SPERMATOPHYTA 



343 



Fig. 292. Leafy branch of Cupressus macrocarpa with ripe cones, about one-half 

 natural size. 



Fig. 293. Cross section of a leaf of Piniis niyra, X75. The thick-walled epidermal and 

 hypodernial layers surround the mesophyll, with infolded cell walls, and containing several 

 resin ducts. The endoderniis encloses the transfusion tissue and two vascular bundles, 

 in which the jiyleni lies below the phloem. 



