S"/ 



Fig. 1. A. Longitudinal section through a young bud; S.S, saccate sepal; 

 S, sepal; P, petal. X 118. B. Older bud; further development of primor- 

 dia. X 118. C. Bud with all primordia present; 'p, petal; st, stamen with 

 anther tissue forming; c, carpels; a, appendages of the set of stamens behind 

 those that appear in the figure. X 118. D. Longitudinal section of the ovary 

 at the time of archesporial division (diagrammatic). E. Archesporial division 

 has taken place. Primary parietal and primary sporogenous cells at the end of 

 the axial row. X 530. F. A cross-section of the ovary at the same stage, show- 

 ing the five cavities and ovules beginning to take the anatropous position (dia- 

 grammatic). G. Longitudinal section of the ovary showing the position of a 

 fully formed ovule on the placenta (diagrammatic). H. A single ovule attached 

 to the placenta, showing diagrammatically the apparent connection between the 

 nucellus and the funiculus. I. The nucellus surrounded by the tapetum. X 530. 

 J. The enlarging megaspore. X 530. K. The first division occurring in the 

 embryo-sac. X 1000. 



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