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Payne, G. F. 1959. Responses of two range grasses to foliate removal. 

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:.. .. .. ^'^ P?' 



■lOiTi:^ .1 .iiv ,lv 



Peterson, R. A. 1953. Clif Lake Natural Area (Madison County, Montana) 

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photographic record. Arizona Agr. Expt. Sta. Rept. No. 214. 185 pp. 



Polk, R. B. and K. N. Boe. 1950. Succession of trees on cut-over larch - 

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Reitz, L. P. 1937. Crop regions in Montana as related to environmental 

 factors. Mont. Agr. Expt. Sta. Bull. No. 340. 



Reitz, L. P., and H. E. Morris. 1939. Important grasses and other 



common plants on Montana ranges. Mont. Agr. Expt. Sta. Bull. No. 

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Robinson, D. H. Trees and forests of Glacier National Park. U. S. Natl. 

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Roe, A. L. 1956. The effect of competition in old growth western larch- 

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Ross, R. L. 1962. Check list and identifying characteristics of some 

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Rydberg, P. A« 1897. Grasses and forage plants of the Rocky Mountains. 

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Rydberg, P. A. and C. L. Shear. 1897. A report upon the grasses and 

 forage plants of the Rocky Mountain region. Bull. USDA, Div. of 

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Rydberg, P. A. 1899. Cespitose willows of Arctic America and the Rocky 

 Mountains. Bull. N. Y. Bot. Garden, 1: 257-278. 



Rydberg, P. A. 1900. Catalogue of the flora of Montana and the Yellowstone 

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Rydberg, P. A. 1900. Phytogeography of Montana. Bull. Torrey Bot. 

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