74 ALIEN FLORA OF BRITAIN 



Pyrus communis, L. Cultivated from very ancient 

 times in England, and frequently occurring as an escape 

 from cultivation. 



P>OSa alba, L. A native of the East which has occurred 



as a garden escape in England. 



P>Osa alpina, L. A native of the mountains of Central 

 and Southern Europe which has occurred as an alien 

 near gardens in England. 



Hosa cinuamomea, L. Native of the Alps of Northern 

 Europe and Siberia, and occasionally found in hedges 

 and woods in England in the neighbourhood of 

 houses, 



]Kosa gallica, L. A native of dry woods on the 

 Continent of Europe. Cultivated in England, and once 

 or twice observed as an escape from gardens. 



P.OSa lucida, Ehrh. A native of North America. 

 Cultivated in English gardens, and recorded occasionally 

 as an escape. 



Hosa pomifera, Herrm. A native of the Orient. 

 Much cultivated in England, and occasionally observed 

 in hedges and woods near gardens. 



S.osa sempervirens, L. Native of woods in the 

 Mediterranean region. Cultivated in England, and 

 occasionally straying into semi-wild surroundings. 



Hubus laciniatus, Willd. A cultivated blackberry, 

 recorded once or twice near gardens. 



