URTICACE^ 171 



Whitwell {Journal of Botany^ 1898, p. 32) from 

 cultivated ground in Hampshire. 



Euphorbia salicifolia, Host. Native of meadows 

 from Southern Germany to Southern Russia. Said to 

 be naturalised in one or two localities in Britain. 



!Merciirialis annua, L. Apparently native in woods 

 in Southern Europe. In other parts of Europe only 

 recorded from cultivated and waste ground. In Britain, 

 especially in the south, it is locally common in such 

 situations. 



URTICACE^. 



•Cannabis sativa, L. Of very wide cultivation from 

 prehistoric tunes in the Old World. One of those weeds 

 in England which, though nowhere established, is yet 

 common from the continuous introduction of its seeds 

 for feeding birds and other domestic uses. 



[Humulus Lupulus, L. Certainly indigenous in 

 woods in England and Wales, as it is also in the 

 neighbouring parts of the Continent. Its frequent 

 cultivation often causes it to appear about arable and 

 waste ground.] 



Farietaria ofB.cinalis, L. Nowhere in Northern 

 Europe is this species recorded from natural situations, 

 though in Southern Europe and in the East it is 

 recognised as native on rocks. In England it is very 



