r R E F A C K. 



(UY TilK EDITOR.) 



The present voliiiiie con lams the lirst j)ortion of tiie 

 works of the distingnished author, now for the first time 

 collected in England, and reprhited from the originals, 

 without change, in accordance with his express desire. It 

 had been his intention to reprint them himself with anno- 

 tations, but, unfortunately for science, this intention was 

 never carried out, and it remained for the Editor simply to 

 superintend a verbatim reprint. 



The Memoirs are arranged in three divisions — 1st. Geo- 

 graphico-Botanical ; :2nd. Structural and Physiological ; 

 3rd. Systematic. Of course this arrangement is in some 

 degree arbitrary, inasmuch as observations relating to both 

 of the other divisions are continually occurring in the 

 Memoirs referred to each of them ; but, on the w^liole, it 

 has appeared to be the' most convenient for reference. 

 The present volume contains the first two of these divisions; 

 the second will be devoted to Systematic Memoirs and 

 Miscellaneous Descriptions of Plants ; and a separate 

 volume, in large 4to, will contain the illustrative figures 

 to both. 



.101 1 \ J. ]u^:nnett. 



1)eci:.mbi:i< 30tii. 1S65. 



lSCif>5 



