ui. | RE 
southern shore of Jashil Kul belongs to the first category. 
The vegetation is mostly composed of the species of the 
Trigonella-formation, very luxuriantly developed. However 
there are some species, not scen in “the Pamirs”, which belong 
to a more mesophytic type than these plants. Ephedra ne- 
brodensis, Astragalus alatavicus, Trachydium sp., Festuca ovina 
var. valesiaca, Prrya nudicaulis, Pedicularis pulchra are species 
showing that this slope is more moist than the others men- 
tioned above. This slope was indeed the end ot the main 
slope of the mountain, exposed to the north; and many 
rushing torrents indicated how much water came from the 
summit. 
The vegetation south of Jashil Kul forms a transition 
between the Trigonella-formation, and the mesophytic form- 
ation on the mountain-slopes exposed to the north. Yet, 
differing from them both in the combination of species and 
conditions of adaptability, it seems to claim consideration as 
a special formation, with a name borrowed from the domin- 
ating species, — Arenaria Meyeri-formation. A typical 
development of this was seen nowhere else. 
I have seen the mesophytic vegetation of moun- 
tain slopes, or the Poa attenuata-formation especially 
well developed in three places in Pamir, — on the two moun- 
tains lying east and west of the lower course of the Mardjanaj, 
(on OLUFSEN’S map in "Geografisk Tidsskrift”, the western 
peak is called “Hens”), and in the Chargush Pass. 
The finest development of Poa attenuata-formation was 
on the north-eastern and northern side of Mt. Hens. Before 
describing it, I will for the purposes of comparison relate a 
few facts concerning the vegetation of the adjacent slopes. 
On the south-western slope, on the ridges between ravines, 
the usual poor Eurotia vegetation, with Stipa, Cicer pungens, 
Acantholimon alatavicum, Silene caucasica and Astragalus lasiose- 
mius, was found. In the clefts, which are green, Arenaria 
Meyeri, Oryzopsis molinioides and Hedysarum cephalotes domin- 
ate. Near the summit the last mentioned species becomes 
common, and many Elymus lanalus var. canus and Senecio 
Paulsenii appear. 
Seen from a distance the eastern slope looks green, but 
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