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



Plate V 





:-v/^r^ 





^WrlQ^^'it}^^ 







Fig. I. Idioblasts from macerated leaves. Alicro-photograph, X I75- 

 Fig. 2. Transverse section hypocotyle stained with copper acetate. 



Tannin cells black. X i8. 



Fig. 3. Micro-photograph of upper epidermis. X I75- 



Fig. 4. Lower epidermis, showing stomata. Micro-photograph, X I7S- 



Fig. 5. Lower epidermis with cells of the hypodermis shown. Dark 



cells stained for tannin, light areas stomata. Micro-photograph, X i/o- 



