96 III. INTEODUCED SPECIES. 



given to tliem, which is essential in the stjle of argument 

 resorted to by M. De Candolle. The term " situation " 

 is here used for the kind or sort of places in which plants 

 occur. The word " station " is current among Continen- 

 tal botanists, and must probably be adopted by those of 

 England, though not so applicable in our language. We 

 ordinarily mean the exact or special spot, rather than 

 the kind of place, by the word " station " ; as when 

 speaking of a railway- station, or police-station, or view- 

 ing station, &c. 



In the subjoined list of introduced and dubiously na- 

 tive species, it is endeavoured to institute a comparison 

 between the conclusions drawn by M. De Candolle and 

 those given in this work, on the nativity of the species. 

 In regard to several of them it is not easy to reduce 

 the views of M. De Candolle to the brevity of one or 

 two words set in column, without risk of giving those 

 views somewhat incorrectly, or at least in terms too little 

 qualified ; because the Author of the Geographic Botani- 

 que often balances the opinions of others, without stating 

 his own in explicit terms. His primary object was to 

 select a list of species which could be regarded as "either 

 certainly or probably naturalised " in Britain. In the 

 Geographie these are distinguished by a difference of 

 type, and may be known in the subjoined list by the 

 single term "Naturalised." But from -these, it must be 

 recollected, M. De Candolle excludes the corn-field or 

 agricultural weeds as being not yet actually naturalised. 

 The word " Introduced " is used for such species, the 

 colonists of the present work, and for various others 

 which are known or supposed to be of foreign origin. 



The first column of the List includes the names of all 

 the sj)ecies, which are more or less strongly suspected to 



