G H 



FIG. 36. Lilium ptiiladelphicum. E, mitotic figure of the reduction division showing- 

 the short, thick chromosomes characteri'stic of this stage ; F, binucleate embryo- 

 sac ; G, four-nucleate embryo-sac ; H, " double fertilization " ; in the egg the darker 

 nucleus is the male and the lighter one the female; just beyond the egg three 

 nuclei are fusing; the antipodal polar nucleus forms about one-half of the complex, 

 while the micropylar polar nucleus and the male nucleus form the other half, the 

 male nucleus being on the right and touching both polar nuclei. E-G x 466;. 

 H x 520. Negatives by W. J. G. LAND. 



