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INTRODUCTION TO EMBRYOLOGY OF ANGIOSPERMS 



A 



B. 



J 



D 



C E F G J 1 



Fig. 138. Some stages in development of endosperm and embryo in Loranthus 

 sphaerocarpus Bl. A,B, young proembryos of same age viewed from two different 

 sides. C, lower end of young proembryo. D, upper part of embryo sac, showing 

 elongated proembryo. E, lower part of same embryo sac, showing early stage in 

 endosperm formation. F,G, upper and lower halves of embryo sac, showing embryo 

 and endosperm. H, embryo beginning to penetrate through endosperm. 7, same, 

 more advanced stage. /, terminal part of embryo, shown at a somewhat higher 

 magnification. (After Treub, 1885.) 



