Chap. IV] MOUNTAIN REGIONS IN TEMPERATE ZONES 757 



tains, which lie somewhat further north. But the lofty Jakhar Moun- 

 tains, situated in the eastern part of the Kuenlun system, are richer in 

 vegetation. Here the slopes up to 3,000 meters are clad with forest 

 (Abies Schrenkiana, Betula Bhojpattra, Juniperus Pseudo-Sabina, Populus 



Fig. 457. Tibet : a valley in the Kuenlun Mountains. 

 After Piertzow. 



tremula, Sorbus Aucuparia). The alpine region (3,450 to 4,500 meters) is 

 in its lower portion occupied by alpine shrubs (Rhododendron capitatum, 

 R. Przewalskii, Caragana jubata, species of Rubus, Ribes, Salix, Poten- 

 tilla fruticosa). Above the shrubs comes alpine meadow (Astragalus sp., 

 Oxytropis, various Umbelliferac, Meconopsis racemosa, M. quintuplinervia, 

 Caltha palustris, Trollius pumilus, Corydalis sp., Iris ensata, Polygonum 



