INTRODUCTION. 9 



materially by examining critical species submitted 

 to him, and by furnishing me with specimens, and 

 with valuable general information. The like kind- 

 ness I have also received from the other 

 contributors to the "Journal of Botany," who 

 not only allow me to make free use of their 

 papers, but have favoured me with specimens. 

 My warmest thanks are especially due to Professor 

 Babington, F.R.S., and Mr. J. G. Baker for 

 great kindness received from them, and for the 

 counsel and assistance with which they have 

 favoured me. The late Dr. Boswell, Mr. J. E. 

 Bagnall, A.L.S.; Dr. Buchanan- White, Mr. N. E. 

 Brown, of Kew ; Mr. J. Groves, F.L.S. ; and 

 Mr. F. J. Hanbury, F.L.S. , have also assisted 

 me by examining specimens submitted to them, 

 and I seize this opportunity of tendering my 

 thanks to them for their valuable criticisms ; and, 

 further, I have to express my grateful acknowledg- 

 ments to the following friends in addition to those 

 already mentioned, who have kindly furnished me 

 with information and with specimens of the plants 

 gathered by them, whose names are placed against 

 the habitats for which they are responsible : 



Kev. F. Atkinson, M.A., Rector of Darley. 



Mr. C. Bailey, F.L.S., Whalley Range, Manchester. 



Mr. Bland, Duffield. 



Mr. J. H. Burkill, Caius College, Cambridge. 



Mr. E. Candler, Repton School. 



Rev. Canon Carr, M.A., Holbrook Hall, Derby. 



Mr. J. W. Carr, B.A., Cant., University College, 



Nottingham. 



Rev. R. Fielden, Muggington Rectory, Duffield. 

 Dr. Fraser, M.A., Wolverhampton. 

 Mr. C. T. Green, L.R.C.P. Lond., Birkenhead. 

 Mr. J. Hagger, Repton. 

 Mr. Hannan, Ashton-under-Lyne. 

 Mr. J. T. Harris, Burton-on- Trent. 

 Rev. H. C. Hasse", Ockbrook. 



Mr. Arnold Lees, M.R.C.S. Eng., L.R.C.P. Lond., Leeds. 

 Rev. W. R. Linton, M.A., Vicar of Shirley, Derby. 

 Mr. J. R. B. Masefield, M.A., Cheadle. 

 Rev. H. Milnes, Vicar of Winster, Matlock. 

 Mr. F. G. Playne, Stroud. 

 Mr. Rowland, Matlock Bath. 



