PLATE 37 

 Teratological tissue of Fi hybrid Crepis capillaris X C. tcctorum. Z 5. 



Fig. 1. A vertical, not quite median, longitudinal section of the abortive 

 plumule of a seedling. X 530. 



a. An isolated patch of tissue surrounded by the slime (dark in reproduc- 

 tion) of disintegrating cells. Within the patch are the leaf tracheids and an 

 irregular mass of meristematic dividing cells. 



fe. Above the main patch of meristem is a second smaller layer, also lying 

 free in a layer of slime. It is about ten cells long and two or three cells thick. 

 The cells nearest it on all sides are fully matured parenchyma. 



c. Side section of apex of plumule showing only mature cells. 



[202] 



