vi PREFACE. 



thought proper of his material in the preparation 

 of an inexpensive book, designed to teach the 

 Elements of Botany on Professor Henslow's plan 

 of selected Types, and by the use of " Schedules." 



Feeling that there might be good service in a 

 book of this kind, which, instead of interfering with 

 the excellent text-books of Botany already published, 

 might serve rather as introductory to them, and 

 suffice, with constant reference to the plants them- 

 selves, to insure to the diligent learner a sound 

 foundation for more advanced Botanical studies, I 

 determined to prepare these " Lessons in Elementary 

 Botany," basing the systematic portion (Part II.) 

 upon the Type Lessons, which formed the largest 

 and most valuable part of Professor Henslow's 

 manuscripts. 



As no sufficient introduction to Systematic Botany 

 had been prepared by Professor Henslovv, I have 

 drawn up a few chapters, embracing the elements of 

 Structural and Physiological Botany, treated in as 

 simple a way as appeared to me consistent with 

 practical usefulness. These elementary chapters it 

 is desirable beginners should master before under- 

 taking the methodical study of the Ordinal Types. 

 In working up the latter, I have made the most 

 free use of Professor Henslow's materials, frequently 

 quoting entire passages from his manuscript. I have, 

 however, omitted much which Professor Henslow 



