VI PREFACE. 



In the chapters on the Natural Orders some paragraphs 

 have been enclosed in square brackets. This is to indicate 

 that the plants described are not found growing wild in 

 Britain, but are commonly cultivated in gardens, shrubberies, 

 or plantations. 



For the loan of certain illustration-blocks I am indebted to 

 the courtesy and kindness of Messrs. Baird and Tatlock, Cross 

 Street, Hatton Garden, London, E.G. ; the Council of the 

 Linnean Society ; Dr. T. W. Woodhead ; Dr. W. Gr. Smith ; 

 and my colleague Mr. E. E,. Marie, B.Sc. 



Mr. W. B. Clive has prepared an excellent set of micro- 

 scopical preparations (Plant Biology Set of Micro. Slides, 

 price 25s.), which will be found to answer admirably for 

 use with this book; the set is accompanied by a descrip- 

 tive booklet. 



I shall be very glad to receive suggestions and criticisms 

 from teachers and others who use this book. 



F. CAVEES. 



HARTLEY UNIVERSITY COLLEGE, 

 SOUTHAMPTON. 



NOTE ON SECOND EDITION. 



The only important change in this Edition is the inser- 

 tion of a new Appendix dealing with Soils. This contains 

 an elementary account of the physical and chemical charac- 

 ters of the principal types of soil, especially in relation to 

 vegetation. 



