1858.] NATURALIZED PLANTS OF GREAT BRITAIN. 455 



all the Floras of the west of France, and Asperugo is said to be 

 common in Normandy. 



Urtica pilulifera, from its name of " Roman Nettle/' was 

 perhaps introduced at the time of the Roman domination in 

 Britain. 



Rumew pulcher De Candolle considers to have become esta- 

 blished in Europe during modern times. Though a striking 

 species, it was scarcely known to the old botanists : its native 

 country may have been Tartary and the Caucasus. 



The seeds of Ononis reclinata are more likely to have been 

 transported upon birds or in ships than in any other way ; pos- 

 sibly they were conveyed by ocean currents to the Scotch loca- 

 lity ; but as the plant is a native of Portugal and the sand-hills 

 of the west coast of France, had its range extended originally to 

 Galloway, we should expect to find it equally in Ireland, or the 

 south-west of England."^ 



3. A third section consists of 10 species, whose presence in 

 Britain is not readily explained, either by their frequent cultiva- 

 tion, or by the structure of their seeds : — 



Oeraniumpyrenaicum, L. C, B., BT. & A. ScropTiularia vernalis, L. C, B. 



Sedirni dasyphyllum, B., H. & A. Linaria supina. ^ 



Sedwm album, B. Veronica Biixbaumli. 



Pyrethrum Parthenium, L. C, B ., H. & A. Lamium maculatum. 



Datura Stramonium. Euphorbia Cyparissias. 



Geranium pyrenaicum was unknown to the old English bota- 

 nists ; it is found truly wild in the east only of France. 



Sedum dasyphyllum. The English stations are on walls, and 

 too often near gardens. As a wild plant it grows at Maestricht, 

 in Holland, and in the department of Calvados, in the north of 

 France. 



Sedum album, like the former, has not sufficiently wild stations 

 in England. 



Pyrethrum Parthenium. We are told its native habitat is in 

 the mountains and hills of Turkey and south-eastern Europe, 

 whence it has been conveyed for the sake of its use in medicine. 

 The French and German stations are as suspicious as our own. 



Scrophulai'ia vernalis. A distinct species not mentioned by 



* We can only quote Sinapis monensis as an example of a plant belonging to 

 Watson's " Atlantic Type," that is found in (both England and) Scotland, without 

 reaching Ireland. 



