PLANT REPRODUCTION 



FIG, 74. Embryo sac and embryo of Claytonia virginica; (a, 6, c, d) one, two, four and 

 eight nucleate embryo sacs; (e) eight -rinclea'te embryo sac, the two polar nuclei united to 

 form the endosperm nucleus, the antipodal cells disintegrating; (/ to /) stages in the forma- 

 tion of the embryo, one synergid visible in/, g, j and I; endosperm shown in /. 



