THE VEGETATION OF NORTH-WEST MONGOLIA. 385 
An Account of the Plants collected by Mr. M. Р. Price on ће Carruthers- 
Miller-Priee Expedition through North-West Mongolia and Chinese 
Dzungaria in 1910. By M.P. Prick, M.A., and N. D. Simpson, B.A., 
Е.К.М.8. (Communicated by Dr. О. Starr, F.R.S., Sec.L.5.) 
(With Map and Prarrs 21-23.) 
(Read 17th April, 1915.) 
I. 
OBSERVATIONS ON THE VEGETATION OF THE SIBERIAN-MONGOLIAN 
FRONTIER, THE Norru-West MowNaorLiAN. PLATEAU, 
AND CHINESE DZUNGARIA. 
By M. P. PRICE. 
Tug expedition which yielded the material for the present paper was under- 
taken during the spring and summer of 1910 in company with Mr. Douglas 
Carruthers and Mr. J. H. Miller, the former of whom contributed a paper 
on the geographical results of the expedition to the Royal Geographical 
Society’s Journal in June 1912. 
Botanieal observations and collections were made by the writer of this 
section of the paper throughout the journey from Minnusinsk to the Siberian- 
Mongolian frontier and through N.W. Mongolia and Chinese Dzungaria 
until Kuldja was reached. A map showing the route of the expedition 
and the localities mentioned in the paper will be found on РЇ. 20. It bas 
been reprinted, with the addition of certain place-names, from the Journal 
of the Geographical Society, June 1912, with the permission of the Society. 
The plants collected by me have been worked out by Mr. N. D. Simpson, 
who has incorporated most of my field-notes in the part of the paper under 
his name. My thanks are due to the Royal Geographical Society for per- 
mission to reproduce the map, and to the Director of the Royal Gardens, 
Kew, for permitting Mr. Simpson to use the material in the Kew Herbarium. 
A. THE BASIN OF THE UPPER YENISEI. 
Itinerary and General Notes. 
The Upper Yenisei plateau comprises an area drained by two rivers, called 
by the natives the Bei Kem and the Khua Kem, and is the upland from 
which the Siberian Yenisei River rises on the border of Siberia and 
Mongolia. The area is roughly 64,000 square miles, and the whole 
drainage area unites in one large stream called the Ulu Kem, and bursts 
through the mountain wall of the Sayansk range about 150 miles south of 
