VI PREFACE. 



hoped that the brief general description prefixed to the 

 study of each type will suffice for the identification of 

 the plant named, even by those students who work 

 without the assistance of a qualified teacher. 



I am myself responsible for the whole of this second 

 part ; but I wish to acknowledge help from many 

 friends, and specially the constant assistance and 

 criticism of Dr. Vines, who has revised all the proofs. 

 Also I have received suggestions from Dr. Scott in 

 connexion with the chapters on the Seaweeds, and 

 from Professor H. Marshall Ward, who has kindly 

 revised the chapters on the Fungi. 



F. O. BOWER. 



GLASGOW, June, 1887. 



