Es = : 
The forests of Olgin Lug were the only luxuriant forests 
seen on our expedition in Turkestan, and the sudden transi- 
tion to the parched, wind-scourged Pamir was striking. Yet 
of all the 98 species I saw on and near Olgin Lug, about 
one half (48 °/o) are also to be found in Pamir, while only 
7/0 were in common with those of the Transcaspian Lowlands. 
As both Pamir and Transcaspia have very little rainfall, it 
must be the conditions on the mountains which are common 
for Pamir and Alai. 
The species common to Olgin Lug and Pamir are the 
following: 
Allium monadelphum Lloydia serotina 
Androsace villosa : Macrotomia euchromon 
Anemone narcissiflora Oxytropis humifusa 
Aster alpinus Parnassia subacaulis 
Astragalus pamiro-alaicus Phlomis oreophila 
Atropis convoluta 
Bromus crinitus 
Carex stenophylla 
Cortusa Matthioli 
Cystopteris fragilis 
Draba fladnizensis 
— incana 
— media 
Ephedra distachya 
Euphrasia Regelii 
Festuca ovina 
Poa persica 
Polygonum acerosum 
— rumicifolium 
Potentilla bifurca 
— hypoleuca 
— nivea 
Primula farinosa 
Psychrogeton turcestanicum 
Ranunculus songoricus 
Rhodiola rosea 
Saxifraga cernua 
Gentiana leucomelaena Scirpus compressus 
Isopyrum anemonoides Smelowskia calycina 
— grandiflorum Triglochin palustre 
Kobresia Royleana Valeriana caespitosa 
Leontodon alpinum Veronica cardiocarpa 
Ligularia altaica Viola uniflora. 
Linum perenne 
The above list is given here because it shows that none 
of the plant species forming the xerophytic plant communities 
of Pamir are to be found in Alai at Olgin Lug. The species 
