CRUCIFER^ 2/ 



Rapistrum linneanum, Boiss. and With. A very 

 common weed of cultivated fields in some parts of the 

 Mediterranean region. Once found among aliens derived 

 from corn-siftings in Britain. 



Rapistruiu orieutale, DC. Native in the pastures of 

 South-East Europe. A weed of cultivated ground in the 

 greater part of the Continent, but in England only a 

 casual grain introduction. 



Rapistrum perenne, All. A weed of Central and 

 Southern Europe which has been recorded from a few 

 English localities in connection with imported grain. 



Rapistrum rugosum, All. A common cornfield weed 

 in some parts of the Mediterranean area, and more rarely 

 in other parts of Europe. In Great Britain it is very rare 

 in cultivated ground, but is more commonly met with 

 among the siftings of foreign grain. 



Securigera Coronilla, DC. A common weed of 

 cultivated ground in South-East Europe. Once re- 

 corded in England among weeds introduced with grain 

 from that region. 



Senebiera Goronopus, Poir. A common weed of 

 roadsides, farmyards, and such-like situations in 

 Britain. It has not yet been recorded in quite wild 

 habitats, such as it occurs in in the Mediterranean region, 

 though it is quite likely that it may have maintained 

 itself about the haunts and tracks of wild animals before 

 man's advent in the country. It should therefore for 

 the present be classed as a long-established introduction. 



