260 GENERAL MORPHOLOGY OF PLANTS 



\ 



breviated as follows: FE P asp P asp P \ / FE, etc. 



In some of the blights and downy mildews zoospores are pro- 

 duced on the germination of the fertilized egg. The formula for 

 these could be written as follows: FE sp P asp P asp 



P <^ y FE, etc. If g is allowed to stand for each of the gametes, 

 the formula could be written as follows: FE sp P asp 

 P x ^FE, etc. Various methods can be devised to repre- 



o 



sent the life history. 



