Fig. 231. — Ginkgo biloba: A, embryo in upper part of female Kamctophyte, X40; 

 B, topography of same embryo, X 10; C, embryo at about the staj^e shown in fig. 220, 

 X 15; /^, nearly mature embryo, X 10. — From CouLTKRand Chamhkklain, Morphology 

 of Gymnosperms'^ (University of Chicago Press). 



