IOWA ACADEMY OF SCIENCES. 57 



SOME ECOLOGICAL NOTES ON THE VEGETATION 

 OF THE UINTAH MOUNTAINS. 



BY L. H. PAMMEL. 



The Uintah rau^e of mountains extends in a northeast- 

 erly direction from the Wahsatch range to Green river in 

 eastern and northeastern Utah. 



In the range occur types of plants from tlie southwest, 

 the boreal types of the mountains further northward, 

 many forms from the main Rocky mountain flora, besides 

 prevailing forms west of the continental divide. 



The geological and physiographic features of the region 

 embraced by the Uintah range and the surrounding terri- 

 tory of southwestern Wyoming, northwestern Colorado 

 and northeastern Utah are of especial interest, and have 

 been fully treated by White', PowelP, Hayden', King' and 

 others. 



Tributary to the Uintah range are two arid basins. The 

 Green River basin is Hanked on the south by the Uintah 

 mountains and foothills, Green river receiving the drain- 

 age of those mountains. The eastern portion of the basin 

 is skirted by the foothills of the Park range of the main 

 Rocky mountain range. South of the Uintah range is the 

 Uintah basin or the great plateau basin of the Colorado. 

 Clarence King, in speaking of this basin, says: "The gen- 

 eral configuration of the Green River area is that of a 

 rude triangle, having the Uintah system as the base, the 



' On the geolology and physiography of a portion of northwestern Colorado and adja- 

 cent parts of Utah and Wyoming. Rep. U. S. Geol. Survey, 9: 683. 



- Geology of the Uintah mountains. Exploration of the Colorado river of the West 

 and its tributaries. 



^ Sixth Annual Report of the United States Geological Su.rvey of the Teritories, 16: 

 192-20S. 



* Systematic Geology. United States Geological Exploration. Fortieth Parallel. 

 5 I AS 



