CRUCIFERyE 17 



is throughout Europe, Northern Africa, and Western 

 Asia. Its native range cannot be traced. 



Bunias orientalis, L. A native of the meadows of 

 South-East Europe, and spread as a weed of roadsides 

 and cultivated ground over the greater part of the 

 Continent. In England it occurs in arable land, on 

 river banks in the neighbourhood of towns and such- 

 like places, being doubtless introduced with grain and 

 agricultural seed. It shows signs of remarkably rapid 

 extension in recent years. 



Camelina satiya, Crantz. Probably native in the 

 South-East of Europe, throughout the whole of which 

 continent it is a very common weed of cultivation. In 

 Britain it is a frequent plant in cultivated fields, and 

 especially those upon which imported seed has been 

 used. ^ 



Camelina sylvestris, Wallr. A plant of similar 

 range but much less common occurrence than the last. 

 It has only been found once or twice in England, in 

 places where it doubtless owes its presence to imported 

 seed. 



Capsella Bursa pastoris, L. In Britain, as in most 

 temperate countries, one of the most abundant weeds 

 in all localities frequented by man. It certainly owes 

 its maintenance, in the great majority of its habitats^ 

 to human agency, and it apparently does not per- 

 sist in ground which is left undisturbed by man. 

 It is therefore probably not indigenous in this, 

 country. 



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