138 BOTANICAL GAZETTE [FEBRUARY 
Fic, 8. Aseries of sections from an embryo in which the coy 
tube is somewhat developed; the bifurcations are of almost equal depth; 
nye sections were drawn. X 25. 
. 9. Embryo of irregular shape. X 180. 
G. 10, Longitudinal median section of an embryo at right angles to the 
plane of bifurcation of the cotyledonar ridge. x 100. 
IGS. 11-12. Similar to fg. zo, but later stages. X 100 
Fic. 13. Longitudinal section through the plumule of a mature embryo. 
eo llum 
Fic. 14. Longitudinal section of a mature embryo of Podophyllum. 
25. 
PLATE VIII. 
Fics. 15-25. Jeffersonia diphylila. 
Fic. ¥ Two-celled embryo. x 180. . fo - 
Fic. 16. A later stage to show that the suspensor becomes long, De!0 
Goan walls are formed inthe cells at the distal end. X 180. 
Fic. 17. Eight-celled embryo with large synergid near it. X 180 
Fic. 18. Similar embryo with endosperm nuclei in cytoplasm of embryo 
sac. X 100, 
FiG. 19. Older embryo in which the body is somewhat rounded. X 180. 
3G. 20. Embryo in which the body is more elongated than in fig. 15’ 
X 180. 
FG. 21. Form of embryo just before the beginning of the development of 
the pees * 180. 
FiG, 
22. An embryo in which cotyledons are almost developed. X 100- 
Fic. 23. A series of sections from a mature embryo. 
Fic. 24. A series of cross-sections of an embryo, elas that the cotyle- 
dons begin eheis development as a single broad ridge. 5 
F1G. 25. Longitudinal section of a mature embryo. a 25. 
Fics, 26~30. Caulophyllum thalictroides. 
Fic. 26. Embryo at oe of development of cotyledons. x 180. 
F1G. 27. Older embryo. x 
+ ence OF sections dficcogh the plumule and base of the cotyle- 
dons. X 25. 
FIG, 29. A series of sections from an older embryo ; the first eight sec- 
tions are consecutive, the others are alternate. x 25, 
Fic. 30. Longitudinal section of a mature embryo. X 25. 
