Plate V. 



Camera hicida drawing of a pith ray ilhistra.ted in Plate IV. Fio-. 2, 

 showing in detail the formation of the brown drops of the decomposi- 

 tion products in the pith ray cells, X G50. Occasional fine fungal 

 hyphae may be seen passing through the simple pits in the end walls 

 of the pith ray cells. 



58 



