350 



PLANT MORPHOLOGY 





Fig. 299. Fertilization in Pinus. A, lower end of pollen tube, showing small tube nucleus, 

 stalk cell, and two large male nuclei, X250; B, two male nuclei within the egg, the larger 

 one in contact with the egg nucleus, X95; C, male and female chromatin groups inside egg 

 nucleus; X360; D, chromosomes derived from male and female nuclei on a common 

 spindle, X 360. (From Haupt.) 



