Iir. INTRODUCED SPECIES. 121 



several of the species wliicli have been admitted more or 

 less freely into the lists of native British plants. Dr. 

 Godron deems them to be simply naturalisations in the 

 North of France, derived chiefly from comitries more 

 southward or more eastward ; some few from America. 

 If introductions to the North of France from the sources 

 mentioned, there would seem an antecedent probability 

 also of their immigration into England chiefly or solely 

 through human agency. Among the fifty species enume- 

 rated in the subjoined list of these plants, only seven 

 were given affirmatively as natives of Britain, in former 

 volumes of the Cybele ; and it is now believed that two 

 or more of those seven ought to have been placed in 

 a lower category. Half-a-dozen others were there given 

 as denizens or questionable natives. Three dozens were 

 deemed aliens or colonists. This is a fairly close ap- 

 proximation between views put forth quite independently 

 of each other, and yet mutually corroborative when 

 brought together. In the annexed list of these plants, 

 the group to which they were severally assigned in the 

 present work, is indicated by an abbreviation after their 

 names. 



Species introduced into France (Godron). 



Ranunculus arvensis, col. Erysimum clieiranlhoidcs, col. 



Delphinium Consolida, col. Siiiapis alba, col. 

 Papavcr hybridum, col. nigrn, ""t- 



Argeraone, col. Saponaria vaccaria, al. 



Ehoeas, col. Sileiie noctiflora, col. 



Fumaiia micraulha, nat. Lychnis Giihago, col. 



Coronopus didyma, nat. Linum usilatissimuin, al. 



Isatis tincloria, al. Oxalis covniculata, den. 

 Thlaspi arvensc, col. stvicta, al. 



Lepidium Diaba, al. Melilotus alba, al. 



sativum, ill. parviflora, al. 



Camelina saliva, al. Lathyrus Nissolia, nat. 



VOL. IV. ^ 



