176 ALIEN FLORA OF BRITAIN 



out, that its close intermixture with Salix alba in 

 South-West Asia points to the nativity of both in 

 that region, but this does not militate against its 

 indigenous condition in other places. Remains of its 

 wood have been found in recent geological formations 

 in Europe.] 



[Salix pentaudra, L. Mr. Marshall, whose knowledge 

 of the British willows is wide and accurate, tells me 

 that this tree is native in the north of Britain 

 and in Ireland, but only planted in the south of 

 England.] 



[Salix triandra, L. Although the species has been 

 doubted as a native in England, the writer cannot dis- 

 cover any valid objections to its native range, which 

 covers Northern and Central Europe, being considered 

 to extend to this country.] 



CONIFERS. 



Larix europaBa, DC. A native of the Alps of Southern 

 Europe. Cultivated in England since the seventeenth 

 century, and now semi-naturalised in some places. 



Pinus excelsa, Vill. A native of the Himalayan region. 

 Seldom seen out of parks and gardens, and then only 

 where planted. 



Finus Laricio, Poir. A native of South-East Europe. 

 Much planted for ornament in Britain, but seldom 

 giving the impression of being naturalised. 



