38 ALIEN FLORA OF BRITAIN 



well as in the first-named locality. It has not been 

 cultivated for ornament, and its introduction in these 

 localities is difficult to explain. 



[Silene conica, L. Native on the sea-coast of Britain 



and of the Continent of Europe. It is most common 

 as a grain-sifting introduction and as a cornfield weed, 

 its presence being due in both cases, no doubt, to its 

 frequency in some parts of Europe on sandy cultivated 

 ground.] 



Silene conoidea, L. Once found as a casual intro- 

 duction in Yorkshire. Introduced, doubtless, with seed 

 from Southern Europe, where it is often a common 

 cornfield weed. 



Silene dichotoma, Ehrh. A common weed in the 

 cultivated land of Central and South-East Europe. 

 It has occurred in numerous localities in Britain, both 

 as a weed in cultivated fields and also near mills and 

 other places to which foreign seed is imported. 



[Silene Gucubalus, Sm. Native on sea cliffs in 

 Britain, and also perhaps in a few inland localities, 

 but much more common as a weed of field borders, 

 hedges, and roadsides.] 



Silene Fabaria, Sibth. and Sm. A native of South- 

 East Europe, cultivated in English gardens, and 

 recorded as an escape in Cornwall. 



Silene gallica, L. A species having a remarkably 

 small native range compared with its wide distribution 

 as a weed of cultivated ground. It occurs, independently 



