TABLE OF CONTENTS. XV 



PAGES 



TOPIC IX : DlCOTYLEDONES WITH UNITED PETALS, FLOWER PARTS 



IX FOUR WHORLS 2 75~ 2 77 



Order Tubiflorte : Family Labiatse ; the mint family. 



Order Personatse : Family Scrophulariacese; the figwort family. 



CHAPTER XLVI. 



TOPIC IX, CONTINUED 2 78-282 



Order Aggregate : Family Composite ; the composite family. 



PART III: ECOLOGY. 



INTRODUCTION 283-291 



Suggestions for ecological study. 



CHAPTER XLVII. 

 SEED DISTRIBUTION 292-299 



CHAPTER XLVIII. 

 STRUGGLE FOR OCCUPATION OF LAND 300-305 



CHAPTER XLIX. 

 ZONAL DISTRIBUTION OF PLANTS 306-310 



CHAPTER L. 



SOIL FORMATION IN ROCKY REGIONS AND IN MOORS 311-327 



CHAPTER LI. 

 PLANT COMMUNITIES ; SEASONAL CHANGES 328-336 



CHAPTER LII. 

 ADAPTATION OF PLANTS TO CLIMATE 337-34 J 



APPENDIX 343-353 



GLOSSARY 355-360 



