PLATE 12 

 Early rosette stage of Chinese colza seedling: 



A. — Plants from (i) brown seed and (2) yellow seeds. Three weeksold. Grown in 

 greenhouse. Planted March 14, 191 7. 



B. — Usual form, showing almost entire leaves. Three monthsold. Grown in green- 

 house. Planted January 20, 1017. 



