133 



III. INTRODUCED SPECIES. 



OEuulheia biennis, al. 

 Foeniculuin " officinale,'' uat. 

 Tui-fjenia lalifulia, col. 

 Helmintliia ecbioides, nat. 

 Lactuca saligna, nat. 

 Baikliausia setosa, al. 

 Carduns marianus, den. 

 Centaurea Cyanus, col. 



solstitialis, al. 

 Erigeron canadensis, al. 

 Clirysantheinum segetuin, col. 

 Specularia liybvida, nat. 

 Cusuuta Tiifolii, col. 



Datura Siiamouium, al. 

 Veionica Buxbaumii, al. 

 Melampyium aiveuse, nat. 

 Mini 111 us liiteus, al. 

 Leonuvus Caidiaca, den. 

 Nepela Cataria, nat. 

 Bovago officinalis, al. 

 Asperugo pvocumbens, den. 

 Eupliorbia platyphyllos, col. 

 Apera Spica-venti, col. 

 Bi'oiuus secalinus, col. 

 Avena strigosa, al. 

 Lolium ttmuleutum, col. 



British botanists have in general regarded fully half of 

 the sjDecies above enumerated, in the light of original na- 

 tives of Britain. Their imiDerfect title to be so desig- 

 nated, is in much closer accordance with the view taken 

 by Dr. Godron, on their non-indigenous character in 

 North France. If he had used the like series of terms, 

 it is probable that Dr. Godron would have applied 

 those of ' colonist ' and ' alien ' to almost all of these spe- 

 cies in France. The English reader may here be re- 

 minded, that this concurrence is not affected by the 

 objections before made (page 89) to the arguments of M. 

 De Candolle. Though similar conditions on the two 

 sides of the sea, Gallic and Britannic, may corroborate 

 each other in some degree ; yet opposite conditions can- 

 not therefore be deemed to negative each other. 



G. Statistical bearings of Introduced Species. 



Looking to the large number of sjiecies in the more 

 civilised and agricultural countries, which are known or 

 conjectured to have been introduced by human agency, it 

 becomes a matter for consideration, how far tliey will 



