THE BROAD-LEAVED TREES 157 



The Sessile or Durmast Oak (Quercus sessiliflora) has much 

 the same characteristics as the English oak ; it is the more 

 common species in Wales. It is on the whole a hardier tree, 

 and is content with poorer soil than is the English oak ; it 

 should be preferred at high elevations and on the poorer and 

 drier soils. It does not tend to produce horizontal branches, 

 and it is therefore easier to obtain straight clean timber from 

 woods of sessile oak. 



Occasionally when an oak has been felled the timber is 

 found to be brown in colour. This is ' Brown Oak ', which is 

 worth from six to ten shillings per cubic foot. 



The Turkey Oak (Quercus Cerris). 



A native of South Europe, it was introduced into Great 

 Britain in 1735. It does best on southern aspects and 

 sheltered positions, and prefers dry loamy soils ; limy loams 

 or clayey limes suit it well. It grows quicker than the 

 English oak, but it will never be a valuable forest-tree as its 

 timber is not so durable as that of the English or sessile oak, 

 and is very heavy. It is used for furniture and cabinet- 

 making. It forms a fine ornamental tree in a park, but it 

 gets injured if much exposed to wind. 



Plane. 



There are three species often planted in avenues and parks 

 in large towns : the Oriental plane (Platanus orientalis) ; the 

 Western plane (Platanus occidentalis) ; and the London plane 

 (Platanus acerifolia\ a variety of the Oriental plane. None of 

 these are forest-trees, but they are very ornamental and flourish 

 in towns where other trees are killed by the smoke and dirt, 

 and they are chiefly used for town planting. They do best 

 on deep, light, moist soil and in sheltered positions. They 

 can be grown from seed, but they are best propagated from 

 layers or cuttings. The timber is of good quality, and is used 

 for the framework for veneering. 



