xii TABLE OF CONTENTS. 



CHAPTER XXXII. 



PAGE 



COMPARISON OF FERNS AND THEIR RELATIVES 292 



Classification of the Pteridophytes 295 



CHAPTER XXXIII. 

 GYNMOSPERMS 297 



CHAPTER XXXIV. 

 FURTHER STUDIES ON GYMNOSPERMS 311 



CHAPTER XXXV. 

 MORPHOLOGY OF THE ANGIOSPERMS: TRILLIUM; DENTARIA 318 



CHAPTER XXXVI. 

 GAMETOPHYTE AND SPOROPHYTE OF ANGIOSPERMS ' 325 



CHAPTER XXXVII. 



MORPHOLOGY OF THE NUCLEUS AND SIGNIFICANCE OF GAMETOPHYTE 



AND SPOROPHYTE 340 



PART III. PLANT MEMBERS IN RELATION 

 TO ENVIRONMENT. 



CHAPTER XXXVIII. 



THE ORGANIZATION OF THE PLANT 349 



I. Organization of Plant Members 349 ' 



II. Organization of Plant Tissues 356 



CHAPTER XXXIX. 



THE DIFFERENT TYPES OF STEMS 365 



I. Erect Stems 365 



II. Creeping, Climbing, and Floating Stems 369 



III. Specialized Shoots and Shoots for Storage of Food 372 



IV. Annual Growth and Winter Protection of Shoots and Buds. . . 374 



CHAPTER XL. 



FOLIAGE LEAVES 383 



I. General Form and Arrangement of Leaves 383 



II. Protective Modifications of Leaves 392 



III. Protective Positions 395 



IV. Relation of Leaves to Light ' 397 



V. Leaf Patterns 44 



