2,6 FORESTRY OF JAPAN. 



extended period so that it is valued as railway sleepers. 



Sakura {Prunns pseudo-cerasns Lindl. var. spontanea 

 Maxim.), Kaede {Acer palmatum TJiunb.), Ho-no-ki {Magnolia 

 Jiypolenca S. et Zi). These trees are important species from 

 the standpoint of forests undertakings but there is no district 

 where these trees form pure forests; they grow mixed with 

 other conifers and broad-leaved trees being scattered in all 

 districts. These trees are valuable according to the nature of 

 the crafts into which they are put. The timber of this species 

 being comparatively high in price and limited in their produc 

 tion, the supply does not always meet the demand. In future, 

 it is expected that in the forests owned by the State and the 

 people these trees will be planted mixed with other trees. 



Such deciduous broad-leaved trees as Tochi-no-ki [Ac senilis 

 turbinata B/.), Nire ( Ulmns Campestris Sm. var. lacris Planch.), 

 Han-no-ki (Alnus japonica S. et Z.), Toneriko {F' ax inns 

 Bungeana Dc. var. pubinervis Wg.), Saikachi [GleditscJiia- 

 japo7iica Mia.), Enoki {Celtis sinensis Per si), and Yanagi [Salix. 

 babylonica L.) are not worthy of being cultivated and built up^ 

 into forests regarded from the standpoint of forest economy 

 but in this forest zone, these trees are planted for the purpose 

 of the protection of the principal species in the forests and of 

 the maintenance of the forest lands. 



4. Forests in the Frigid Forest Zone cover the northern 

 half of Hokkaido, the group of Kurile islands and the entire 

 part of Karafuto, occupying the lands whose average annual 

 temperature is below 6 C. and the distributions in respects of 

 altitude they are found in regions above 3,500 metres abovi 

 lebel in I md 1, 800 metres in the central part of Honshu. 



