Chap. IV] MOUNTAIN REGIONS IN TEMPERATE ZONES 755 



of the brooks bear dense shrubby growth (Hedysarum multijugum, Nitraria 

 Schoberi, Comarum Salessowii, Caryopteris mongholica, Hippophae), with 



Fig. 453. Pamirs: Jagatch- Kurgan. From a photograph 

 by Kaznakoff. 



grasses (Hordeum pratense, Triticum strigosum) and herbs (Potentilla 

 bifurca, P. dealbata, Calimeris alyssoides, xAdenophora Gmelini, Rheum 

 spiciforme van). 





* 



Fig. 454. Pamirs : Vegetation on Lake Kara-kul. Eurotia sp. 

 From a photograph by Kaznakoff. 



At 3,300 meters begins the alpine region, in which three stages are 

 recognizable : (1 ) alpine meadow ; (2) stony desert ; (3) perpetual snow. 



The alpine meadow generally lies between 3,300 and 3,900 meters, and 

 possesses a varied vegetation (Oxytropis falcata, O. kansuensis, O. strobi- 

 lacea, species of Astragalus, Gentiana decumbens, G. prostrata, G. tenella, 



3 C 2 



