340 BOTANICAL GAZETTE [November 



Fig, 20. Longitudinal section of ovule with four-nucleate embryo sac. 



X 360. 



Fig. 21. Longitudinal section of slightly older ovule, X 360. 



Fig. 22. Longitudinal section of fruit with nearly ripe embryo sac. X 125, 



Fig. 23. Detail of embryo sac from section shown in last figure. X 360. 



Fig. 24. Longitudinal section of fruit with ripe embryo sac. X 5*^- 



Fig. 25. Embryo sac of same, with surrounding portions of nucellus and 

 inner integument ; synergids from adjoining section. X 360. 



Fig. 26. Longitudinal section of an older embryo sac with a several-celled 

 endosperm. X 360. 



Fig. 27. Similar section of still older embryo sac with twelve-celled 

 embryo, X 360. 



Fig. 28. Similar section showing six antipodals. X 360. 



Fig. 29. Longitudinal section of ripe fruit. X 55.. 



Fig. 30. Longitudinal section of germinating seed; theperisperm above 

 the dotted line has been exhausted of starch. X 75. 



Fig. 31. Similar section at a later stage of germination. X 30. 



Figs. J2-JQ, Peperomia pelhicida Kunth. 



Fig. 32. Longitudinal section of ripe fruit. X 55. 



Fig. 33. Terminal part of a similar section at an early stage of germina- 

 nation. X 175. 



Fig. 34. Longitudinal section of same at still later stage, showing tip of 

 integument and carpel burst off by swelling of endosperm and embryo, X 3^- 



Fig. 35. Detail of embryo and endosperm of same. X I7S< 



Fig. 36. Longitudinal section of germinating seed (with adhering carpel- 



lary tissue), showing radicle pushed out through endosperm. X 55- 



Fig. 37. Surface view of seedling with seed about ready to drop from the 



cotyledons. X 30. 



Fig, 38, Detail of same, showing seed and tips of cotyledons. X S^- 

 Fig. 39. Seedling with expanded cotyledons, showing plumule, X 5- 



