580 



ZONES AND REGIONS [Pt. Ill, Sect. II 



there is a corresponding and deep-seated analogy in the oecology, and the 

 Siberian forest likewise is a thin, poor, often stunted, coniferous forest, with 

 very little or no underwood. Larches predominate (Larix sibirica and, in 

 the east, L. dahurica, Fig. 322) ; with them grow Pinus Cembra, Picea 

 obovata and P. ajanensis, birches, and, in the south, Abies Pichta. 



Fig. 322. Forest of Larix dahurica in Saghalin. From a photograph by Krasnov. 



Whilst, on the one hand, on the west coast of North America rich 

 atmospheric precipitation and a milder temperature prevail, even in high 

 latitudes, and induce a rich forest growth, in Siberia, on the other 

 hand, the climate is unfavourable to woodland, and, with it, the poor 

 type of forest extends to much more southern latitudes, in places even 

 to 50 N. 



