PLANT REPRODUCTION 



Fig. 74. — Embryo sac and embryo of Claytonia virginica; (a, b, c, d) one, two, four and 

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

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

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



