2O4 



MOSSES AND FERNS 



CHAP. 



A. 



D. 



ara 



FIG. 106. Funaria hygrometrica. Development of the embryo. A, Optical section 

 of a very young embryo; B, C, surface view and optical section of an older one, 

 X6oo; C, D, longitudinal sections of the apex of older embryos, X6oo; en, endo- 

 thecium; am, amphithecium. 



