THE GRASSES OF THE UINTAH MOUNTAINS AND ADJACENT 
REGIONS. 
BY L. H. PAMMEL. 
This paper contains an account of the grasses found in the Uintah 
Mountains and the adjacent Wasatch Mountains in Utah. Most of the 
region has an elevation of over 5,000 feet. The Uintah range contains 
a large number of snow capped peaks; the highest about 13,700 feet 
high. Tributary to the range are two arid basins, the Green River 
Basin to the north and to the south the Uintah Basin. The region has 
been visited by Parry, Jones, Watson, Aven Nelson and some other 
botanists. Dr. Sereno Watson did some extensive work in the region 
as a member of the exploring party of the Fortieth Parallel. I gave 
an account of the physiography of the region in another connection — 
“Some Ecological Notes on the Vegetation of the Uintah Mountains. ”* 
In an earlier paper** I gave an account of the grasses of the Eastern 
Rockies which was somewhat extended later in a paper giving the for- 
age resources between Jefferson, Iowa, and Denver, Colorado,*** and 
subsequently a paper “Notes on Grasses of Nebraska, South Dakota 
and Wyoming.”**** 
The grasses of the region are largely boreal, such genera as Poa, 
Calamagrostis, Agrostis, are well represented. Genera derived from the 
south of the adjacent arid plains are represented by Stipa, of which 
there are seven species, one the Stipa comata reaches northwestern Iowia. 
The S. viridula rather widely distributed in the west is another com- 
mon species. The S. Lettermanii and $. T weedy i are alpine and sub- 
alpine. 
The Hordeum jubatum and its close ally II. cae spit o sum are common 
in alkali spots at lower altitudes while the H. nodosum is common at 
higher altitudes. The Giant Lyme Grass (Elymus condensatus) is com- 
mon along alkali streams or borders of old lake beds from 5,000-7,500 
feet. The marshy parks contain such willows as Salix strida, S. lutea, 
S. dilorophylla and Geum iriflorum, Erigeronglabellus, Poa epilis, and 
P. Wolfii. These parks frequently become dry later in the season. 
*Proc. Ia. Acad. Sci. 10: 57-68; pi. 15-22. ‘ 
*^Pr°c. Soc. Prom. Agrl. Sci. 17 :94. Joint paper with P. Lamson-Scribner. 
***Bull. Div. of Agrost., U. S. Dept. Agr. 9:1-47, f. 1-12. 
****p roc> Davenport Acal. Sci. 7:229-258, pi. 10-16 
