PLATE 10 



A. — Yellow seed of Chinese colza. Approximately X 5. 



B. — Brown seed of Chinese colza. Approximately X 5. 



C. — Surface section of yellow seed of Chinese colza, showing lack of reticulations. 

 Approximately X 103. 



D. — Surface section of brown seed of Chinese colza, showing reticulations. Ap- 

 proximately X 103. 



E. — Cross section of yellow seed of Chinese colza. Approximately X 289. 



F. — Cross section of brown seed of Chinese colza. Approximately X 289. 



E and F show the following : 



(a) Tangentially striated epidermis. 



(b) Almost obliterated parenchyma. 



(c) Sclerenchymatic palisade cells. 



(d) Parenchyma, which in the brown seed (F) contains a pigment. 



(e) Protein layer of the endosperm. 



(t) Compressed parenchyma of the endosperm. 



(140) 



