GRASS-FLORA. OF TOLLAND, COLORADO, AND VICINITY 1 23 



mountain laboratory of the University of Colorado 1 is located here 

 and the district has on this account been rather well examined. 

 Tolland is 8,889 f ee t above sea-level, and the adjacent areas covered 

 in the present study are all of an altitude of 8,500 to 9,500 feet. 

 Following are the localities mentioned in the systematic list: 



Tolland. — A small village on South Boulder Creek in Boulder 

 Park, Gilpin County, altitude 8,889 feet. 



Boulder Park. — An open valley about two miles long and three- 

 fourths of a mile wide, chiefly grassland surrounded by wooded hills — 

 altitude 8,800-9,100 feet. 



East Lake and Park Lake. — Small ponds in Boulder Park. 



Teller Lakes. — Morainal ponds i| miles southwest of Tolland — 

 altitude 9,575 feet. 



Mammoth Gulch. — A valley about one mile southwest of Tolland — 

 altitude 9,000-9,500 feet. Plants collected at higher altitudes in 

 the gulch are not included in the present study. 



Eldora. — A village on middle Boulder Creek in Boulder County, 

 4 miles north of Tolland — altitude 8,600 feet. 



Eldora Lake {Peterson's Lake). — Three and one-half miles north 

 of Tolland in Boulder County— altitude about 9,200 feet. 



Rollinsville. — A small village on South Boulder Creek, 5 miles 

 below Tolland in Gilpin County — altitude about 8,500 feet. 



Smarlweed Lake. — About one mile north of Rollinsville in Gilpin 

 County — altitude 8,600 feet. 



The district included in the present study has roughly the form 

 of a triangle with Teller Lake, Smartweed Lake, and Eldora at the 

 apices. About 12 square miles are included in the area. Various 

 ecological habitats are represented, as coniferous forest, aspen forest, 

 streamside and lake-margin areas, dry grassland, talus slope, etc. 



The Material Examined. — The material includes 290 numbers, 

 collected entirely by Messrs. Francis Ramaley and W. W. Robbins 

 during the years 1906-1911, inclusive. A few species from Eldora 

 have been admitted to the list from the "Flora of Boulder, Colorado, 



1 For an account of the Mountain Laboratory of the University of Colorado see "A Summer Laboratory 

 for Mountain Botany," by Francis Ramaley and W. W. Robbins in Plant World, Vol. XII, pp. 105-110. 



