THE BROAD-LEAVED TREES 161 



exacting as to soil. Its timber is not quite so valuable as 

 that of the sycamore. 



Tulip tree (Liriodendron tulipifera). 



A native of Canada and the United States, it was intro- 

 duced into Europe in 1663. It is an ornamental tree for 

 park planting, and has not been planted in woods. It suffers 

 from late frosts and should therefore be grown in sheltered 

 situations ; it does best in the south of England, and thrives 

 in London parks. It is a light-demander. It does best on 

 a deep loamy soil. It is a difficult tree to transplant, and 

 therefore is not likely to be grown on a large scale as a forest 

 tree in England, though its timber is used for furniture and 

 other purposes under the names of * White Wood ', * Canary 

 Wood ', and < Yellow Poplar '. 



Walnut (Juglans regia). 



A native of Greece, but has been cultivated in Great Britain 

 for many centuries. Although here grown chiefly as a fruit 

 tree, its timber is of considerable value for gun-stocks and for 

 furniture, and it would pay well if grown as a timber tree. It 

 could be introduced in groups here and there in woods of 

 other species on deep, dry, rather light loamy soils. It is a 

 light-demander, and requires plenty of space. It should be 

 grown in sheltered positions as it suffers from late frosts. It 

 is grown from nuts which should be sown in rows two inches 

 deep, and the seedlings should be transplanted at one year 

 old. 



The Black walnut (Juglans nigra) and the Grey ivalnut 

 (Juglans cincrea) would also perhaps prove to be good forest 

 trees in the warmer parts of England. Walnuts should be 

 grown on a rotation of over a ico years, as the valuable 

 heartwood is not produced till the tree is fifty to sixty years 

 old. 



