Proceedings am. Philos. Soc. Vol. LVI. No. 7 



Plate VII 



Fig. I. Transverse section leaf from salt-water grown tree, showing dis- 

 tribution and relative quantities of the leaf tissues. (Cam. luc.) X I33- 

 Dark cells containing tannin, clear cells water storage hypodermis. Columnar 

 cells of palisade, and beneath them spongy parenchyma containing crystals 

 and section of vascular bundle. Below a loose hypodermis. 



Fig. 2. Transverse section of leaf from tree growing in fresh water. 

 Regions same as Fig. i. (Cam. luc.) X 133- 



Fig. 3. Transverse section leaf from tree grown in shore. Regions same 

 as Fig. I. (Cam. luc.) X I33- 



Fig. 4. Transverse section leaf from tree growing off shore. Regions 

 same as Fig. i. (Cam. luc.) X 133- 



PROC. AMER. PHIL. SOC, VOL. LVI QQ, J.\XU.\RY 9, IQlf 



