418 BOTANICAL INFORMATION. 
Grasses, and almost all the articles on Botany and Medical 
Natural History in the Dictionary of Materia Medica. 
The family of Guillemin were of opinion that his wishes 
would be best fulfilled by presenting his herbarium to the 
Cabinet of Natural History, in the town of Dijon; with the 
exception of some very rare species, which were taken out 
and given to the Museum of Natural History, in Paris, ac- 
cording to their deceased possessor's express directions. 
British Willows. 
Weare happy to learn that the Rev. J. E. Leefe of 
Audley End, Essex, is assiduously engaged in studying the 
British Willows, with the intention of laying the result of his 
labours before the public, in fasciculi of specimens, at the 
cost ofa few shillings each. The first fasciculus, containing 
upwards of twenty species, and fifty or sixty specimens, it is 
expected, will be ready in the course of the next two 
months. 
Mr. Leefe will have the able assistance of Mr. Borrer, in re- 
ference to the correctness of the nomenclature; but in regard 
to which should, or should not, constitute a species, he only 
wishes to retain such as afford readily ascertainable cha- 
racters, rejecting those which exhibit intermediate forms, 
or where the supposed species appears to be merely a 
description of one form amongst many. 
With such views, there cannot be a doubt that Mr. Leefe 
will render a most important service to the students of this 
interesting and important genus. 
