X PREFACE 



The same remarks also apply to the morphology and 

 development of the Flower, the subject of which must 

 here be necessarily dealt with in a mere sketch. 



The student will find the subject of pollen and 

 pollination b}- Insects, Wind, &c., also dealt with in 

 a general but, I hope, satisfactory and efficient manner 

 suitable to the purposes of the book. 



The lettering denoting acknowledgement of the wood- 

 cuts is as in previous volumes, and the Bibliography at 

 the end of the book shows whence further facts may be 

 obtained. 



As in previous volumes the making of the Index, here 

 a truly laborious task, has been again done by my wife. 



H. MARSHALL WARD. 



Cambridge, April 1905. 



