4 
PREFACE. 
It should be stated that, in the main, the system of 
nomenclature adopted by Engler and Prantl is fol- 
lowed. Names of authors used in connection with 
plant names are omitted, however, except in special 
cases, for several reasons, which need not be considered 
here. The names of plants and genera are for the 
most part printed in italics ; the names of drugs and 
the common names of plants being printed in the 
regular type of the text. 
While this book is intended to be used in connection 
with the lectures given by the author, it is also to 
be employed in connection with a laboratory course. 
The illustrations in Part IV are intended to elucidate 
or bring out those fundamental points in morphology 
which are essential in the study of vegetable drugs. 
It may be said, however, that at the same time 
the important characteristics of a large number of 
vegetable drugs, particularly of the powders, are also 
illustrated. 
In conclusion, the author acknowledges his indebted- 
ness to Miss Florence Yaple, Philadelphia, for invalu- 
able services in the preparation of this book for 
publication. 
