Hooker, J. D. Outlines of the Distribution of Arctic Plants. 



Trans. Linn. Soc. Lond. (B) 23: 251-348. 1861. 

 Kennedy, G. G., and Collins, J. F. Bryophytes of Mt. Katahdin. 



Rhodora j: 177-181. 1902. 

 Merriam, C. H. The Geographic Distribution of Life in North 



America. Rept. Smith. Inst. 1891: 365-415. 

 Merrill, E. D. Notes on Maine Plants. Rhodora i: 185. 1899. 

 Sargent, C. S. Tenth Census Rpt. p: 494. 1880. 

 Schimper, A. F. W. Pflanzengeographie auf Physiologische 



Grundlage. Jena. 1898. 



Scott, W. B. An Introduction to Geology. New York. 1898. 

 Scribner, F. L. Mt. Katahdin and its Flora. Bot. Gaz. 17: 



46-54. 1885. 

 Tarr, R. S. Glaciation of Mt. Ktaadn. Bui. Geol. Soc. Am. 



n: 433-448. 1900. 



Thurmann, J. Essai phytostatique applique au Jura et aux con- 

 trees voisine ou etude de la despersion des plantes vasculaires 



envisagee principalment quant a I'influence des roches sous- 



jacent. Paris. 1849. Review Ann. Sci. Nat. 12: III, 335- 



343. 1849. 

 Unger, F. Uber den Einfluss des Bodens auf die Vertheilung 



des Gewaechse nachgwilsen inden Vegetation des nordoesth- 



lichen Tyrols. Vienne. 1836. Review Martins Ann. Sci. 



Nat. 8: II, 75-93. 1837. 

 Upham. Glaciation of Mountains in New England and New 



York. Am. Geo. 4: 165, 205. 1889. 

 Warming, E. Okologische Pflanzengeographie. Knoblauch 



translation. Berlin. 1896. 

 Whitford, H. N. The Genetic Development of the Forests of 



Northern Michigan. Bot. Gaz. 57; 289-325. 1901. 

 Williams, E. F. Floras of Mt. Washington and Mt. Ktaadn. 



Rhodora 3: 177-181. 1902. 

 Willis, B. Climate and Carbonic Acid. Pop. Sci. Mo. ipoi: 



242-256. 



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