74 Part I. Chapter 2. 
Rose, J. N.: Plants from the Big Horn Mountains of Wyoming. Contributions United States 
National Herbarium III: 567. 
RYDBErG, P. A.: Flora of the Black Hills of South Dakota. Contributions United States National 
Herbarium II, No. 8: 463—536. (1896.) 
Catalogue of the Flora of Montana and the Yellowstone National Park. New York, Memoirs 
of the New York Botanical Garden I, 1900. 
— Composition of the Rocky Mountain Flora. Science, new series XII: 870. (1900.) 
—— The Oaks of the continental Divide, North of Mexico. Bulletin New York Botanical Garden 
II: 187. (1901.) 
—— Flora of Colorado. Experiment Station of the Colorado Agricultural College, Bulletin 
00; pages xxii—447 (1906). 
RYDBERG, P. A. and SHeAR, C.L.: A Report upon the Grasses and forage Plants of the Rocky Moun- 
tain Region. Division of Agrostology, United States Department Agriculture, Bulletin 5. (1897.) 
SCHAFFNER, JOHN H.: Origin of timber Belts. Botanical Gazette XXVII: 392.. (1899.) 
DE SCHWEINITZ, L. D.: Catalogue of Plants collected in Long’s second Expedition to the north- 
western Territory by Mr. THos. Say in the year 1823. (1824.) 
SETCHELL, W. A.: The upper temperature Limits of Life. Science, new series XVII: 934. 
SHANTZ, H.L.: A Study of the mesa Region east of Pikes Peak. Botanical Gazette XLII: 16—47- (1906.) 
—— A biological Study of the Lakes of the Pike’s Peak Region. Transactions Amer. Micros. 
Soc. XXVII: 75—97 (1907). 
SUDWORTH, GEORGE B.: Forest Flora of the Rocky Mountains. United States Forestry Division, 
Bulletin 2: 153. (1889.) 
TILDEN, JOSEPHINE E.: On some algal Stalactites of the Yellowstone National Park. Botanical 
azette XXIV: 194. (1897.) 
TORREY, JOHN: Some Account of a Collection of Plants made during a Journey to and from the Rocky 
ountains in the Summer of 1820 by Epwın P. James. Ann. Lyc. N. Y. II: 161—254. (1828.) 
Catalogue of Plants collected by Lieut. FREMONT in his Expedition to the Rocky Mountains 
in the year 1842). Senate Document 174. Washington 1845. 
—— List of Plants collected on a military Reconnoissance from Fort Leavenworth, Missouri to 
San Diego, California. EMORY’s Report of Reconnoissance: 135—156. Washington 1848. 
—- Description of Plants collected during the Marcy Expedition to the Red River of Louisiana. 
Washington 1354. 
Town, F. E.: Big Horn forest Reserve. United States Geological Survey ıgth Report 1899, 
Part V: 165—186 
TWEEDY, FRANK: Face: of the Yellowstone National Park. Washington 1886. 
-— The Forest of the Yellowstone National Park. Garden and Forest I: 129. 
VASEY, GEORGE: Grasses of Montana. Report Commissioner Agriculture 1888: 317—324- 
WEED, WALTER H.: Formation of Travertine and siliceous Sinter by the Vegetation of hot Springs. 
United States Geological Survey gth Annual Report: 619-676. 
—— The diatom Marshes and diatom Beds of the YVellowstone National Park. Botanical Ga- 
zette xiV: 117. 
— 
won 
194— 218; Feb), Mch, Apr „ 
Wiırtıams, R.S.: A BER List of Montana Mosses. Bulletin New York Botanical Garden D, 
No. 7: 351—380. (1902.) 
le ee. ee A.: Notes on the cafion Flora of northwest Nebraska. American Naturalist 
xXXIV « (1890.) — Notes on the Flora of western South Dakota. 1. e. XXVI: 60—63, 
De aaa 
—— A Report upon the Grasses and forage Plants and forage Conditions of the eastern Rocky Moun- 
tain Region. United States Department Agriculture, Division of Agrostology, Bulletin 12. (1 898.) 
aa en J.: The forest Formations of Boulder Colorado. Botanical Gazette XLIV: 321352 
1907 
WHITFORD, H.: The Forests of the Flathead ven Montana. Botanical Gazette XXXTX: 99122; 
190 
