PLATE 55 



Photomicrographs of root of the Crepis Bureniana plant showing giant multi- 

 nucleate cells. 



a. A cross-section showing a group of giant cells. 

 6. One of the smaller giant cells with two nuclei. 



c. Two giant cells apparently fusing. 



d. A large cell containing a V-shaped metaphase plate with many chromosomes. 



[354] 



