466 J. H. MAIDEN. 



name for trade purposes before it has been thoroughly 

 tested. In other words, we shall probably find it necessary, 

 in future, to employ two lists, one the stereotyped list that 

 the stability of trade requires, and a second list of equival- 

 ents according to the laws of botanical nomenclature. It 

 is not the fault of botanists that the nomenclature of 

 Eucalyptus cannot be stereotyped in 1917. A really 

 remarkable amount of work has been done in this direction, 

 particularly during the last twenty-five years, and while all 

 species will not be discovered and examined, even in a 

 century to come, I consider that it would be a feat of which 

 botanists might be proud, if they find themselves able to 

 secure a fairly stable nomenclature of species in this genus 

 in the course of a further twenty-five years. 



