292 



BOTANICAL GAZETTE 



[OCTOBER 



Fig, 18. Division of embryo initial cell. X500. 



Fig. 19, A stage slightly later than fig, j8, X500. 



Fig. 20. Di\'ision of basal cell of the embryo; length of suspensor 1.84 



mm 



X50O. 



si 



Fig. 21. Di\ision of apical cell of embr}'o. Xsoo. 



Fig. 22. An embyro slightly older than fig, 21; length of suspensor 2.8^ 



mm 



X50O. 



Fig, 23. Organization of dermatogen and beginning of the secondary suspen- 

 sor; length of suspensor 3.1^"^, the longest suspensor found in any preparation. 

 X250. 



Fig. 24. Embrj'o and secondary suspensor. X250. 



Fig. 25. Early stage in formation of the pollen -chamber plug. X250. 



Fig. 26. Epidermal cells of nucellus containing starch. X250. 



r 



