XIV CONTENTS 



CHAPTKR PAflB 



XXIII. Germination 164 



XXIV. Phenogams and Cryptogams 172 



XXV. Studies in Cryptogams 178 



PART II 



The Plant in Its Environment 



XXVI. Wliere Plants Grow 197 



XXVII. Contention with Physical Environment 203 



XXVIII. Competition with Fellows 209 



XXIX. Plant Societies 219 



XXX. Variation and Its Results 228 



PART III 

 Histology, or the Minute Structure of Plants 



XXXI. The Cell 23o 



XXXII. Contents and Products of Cells 245 



XXXIII. Tissues 252 



XXXIV. Structure of Stems and Roots 259 



XXXV. Structure of Leaves 269 



PART IV 

 The Kinds of Plants (p. 275) 



