CONTENTS XIX 



PAGES 



A MONOCOTYL SEED. Its gross structure and histology 215-216 



A MONOCOTYL SEEDLING. Germination and structure 216-217 



A DICOTYL SEED. Its gross structure and histology -. 217-218 



CHAPTER VIII 



TAXONOMY 



THALLOPHYTA. Definition. Characters of the Protophyta, Myxo- 

 mycetes, Algae, Fungi and Lichenes. The Mounting and 

 Staining of Bacteria. Life histories of representative types of 

 Thallophytes. Plants of the group yielding drugs and eco- 

 nomic products 219-282 



BRYOPHYTA. Definition. Characters of the Hepaticae and Musci. 



Life history of a typical true moss 282-287 



PTERIDOPHYTA. Definition. Characters of the Lycopodineae, 

 Equisetineae and Filicineae. Life history of a typical fern. 

 Plants of the group yielding official drugs 287-292 



SPERM ATOPHYTA (PHANEROGAMIA). Definition. Charac- 

 teristics of the Gymnosperms and of the Order and Family 

 yielding important drugs and economic products. Table of 

 official and unofficial drugs yielded by Gymnosperms including 

 part of plants used, botanical origins and habitats. Charac- 

 teristics of the Angiosperms and of the classes and families 

 yielding drugs. Tables of official and unofficial drugs with the 

 names of the plants, parts constituting the drugs and habitats. 292-407 



CHAPTER IX 



ECOLOGY 



PLANT ASSOCIATIONS. Definition. Classification based on re- 

 lation plant associations have assumed in regard to water. 

 Characteristics of Hydrophytes, Helophytes, Halophytes, 

 Xerophytes, Mesophytes and Tropophytes 408-412 



GLOSSARY 412-440 



INDEX 441-479 



