rr.EFACE vii 



a collection of plants drawn from the four corners of tlie 

 phanerogamic kingdom. This plan was found to be the more 

 convenient because it made possible the introduction into the 

 text of the Gymnosperms that possessed medicinal properties. 

 In themselves their small number did not justify the inclusion 

 of the Gymnosperms in the Tables of Classification, more 

 especially as their inclusion would have added considerably 

 to the complexity of the Tables. 



In the preparation of this book the chief writers whose 

 publications were laid under contribution were Holmes, Shen- 

 stone, Sowerby, Greenish, Southall, Bentham and Hooker, 

 Glaister, and Henslow. Finally, my grateful thanks are due 

 to Miss Margaret Ir\s-in for revising my manuscript, and to 

 my wife for help in preparing the diagrams. 



DAVID ELLIS 



Royal Technical Collkgk 



Glasgow. 



