micro- and megasporogenesis. gametophytes, gametogenesis and growth of the 

 embryo, endosperm, nucellus and integuments. Among these processes the 

 events leading up to pollen formation receive relatively much emphasis in this 

 book; on the other hand, embryogeny as such receives little attention, because 

 exhaustive treatment would merit a book in itself. 



The descriptions are entirely verbal; no illustrations are provided. The de- 

 scriptions are preceded by a lengthy introduction which discusses the taxonomic 

 evaluation of embryological characters. 



The bibliography includes close to 5000 references and occupies more than 

 40% of the total number of pages. The book is concluded by indexes to authors 

 and to taxonomic names. 



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