xiv TABLE OF CONTENTS. 



CHAPTER XXXII. 



PAGE 



LIVERWORTS 



Thallose liverworts 33^ 



The foliose liverworts 34 1 



Horned liverworts 343 



Comparative review of the liverworts - 344 

 Alternation of generations 345 



CHAPTER XXXIII. 



MOSSES -346 



Alternation of generations -354 



Comparative review of the mosses 355 



CHAPTER XXXIV. 



FERNS 357 



Some of the common ferns . . 359 



Life history of ferns ... 3 6 4 



Dimorphism in ferns 



Comparative review of the ferns 37 1 



CHAPTER XXXV. 



OTHER FERN-LIKE PLANTS 373 



The horsetails 



The club mosses 37 6 



The quillworts . . . 



Comparative review of the fern plants 3& 1 



CHAPTER XXXVI. 



GYMNOSPERMS 3^7 



The life history of the pine 39 



Other Gymnosperms 39^ 



Comparative review of the Gymnosperms . . 4 O1 



CHAPTER XXXVII. 



ANGIOSPERMS . 45 



The flower 4c6 



Comparative review of the Angiqsperms .416 



