PEEFACE. 



Having acquired, cliiefly through the kindness of different 

 botanists, but partly by purchase, what is probably by far 

 the most extensive collection of Brambles which has ever 

 been formed in this country, I have thought it well to draw- 

 up such an account of them as these opportunities, and a 

 tolerably long-continued study of Ruhi, has enabled me to 

 prepare. My collection contains nearly all Leighton's Euhi, 

 including the specimens submitted by him to the examination 

 of Nees von Esenbech, Borrer, and Lindley, and named and 

 commented upon by them ; a very complete set of Bloxam's 

 specimens, and also of those of Bell Salter and Lees. I 

 have many specimens named by Borrer, Coleman, Hort, and 

 other students of this difficult genus ; have myself collected 

 Brambles extensively in various parts of the kingdom, and 

 have had many species long in cultivation in the Cambridge 

 Botanic Garden. This account of the collection will shew 

 that the opportunities within my reach are such as to render 

 it probable that at least some valuable results may be 

 attained by its study. Unfortunately there is great diffi- 

 culty in obtaining authentic specimens of such unwieldy 



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