THIS paper has been published in Danish under the title 

 "Trsek af Vegetationen i Transkaspiens Lavland» (K0- 

 benhavn 1911, Gyldendal), and in «Botanisk Tidsskrift«, Vol. 

 32. The present edition is issued with but slight alterations. 

 The translation has been revised and corrected by Dr. 

 W. G. Smith, of the College of Agriculture, Edinburgh, who 

 has assisted also in proof-reading. I would offer Dr. Smith 

 my sincere thanks for his valuable assistance without which 

 it would hardly have been possible to find correct English 

 equivalents for Danish botanical terms. 

 A Russian edition is under preparation. 



The author. 



