A STUDY OF THE PHYSIOGRAPHIC ECOLOGY OF 

 MOUNT KTAADN,* MAINE. 



I. INTRODUCTION. 



II. TOPOGRAPHY AND PHYSICAL GEOGRAPHY. 



III. GEOLOGY. 



IV. THE ORIGIN OF THE MT. KTAADN FLORA. 



V. FACTORS. 



A. CLIMATIC FACTORS. 



a. Radiant Energy. 



b. Wind. 



B. EDAPHIC FACTORS. 



C. BIOTIC FACTORS. 



D. HISTORICAL FACTOR. 



VI. THE PLANT SOCIETIES. 



A. THE ROCK SOCIETIES. 



a. The Crustaceous Lichen Society. 



b. The Reindeer-Iceland Moss Society. 



c. The Alpine-Tundra. 



d. The Krummholz. 



i. The North Basin. 



e. The Picea-Abies Forest. 



f. The Roches Moutonnees Society. 



B. THE ALPESTRINE MEADOW SOCIETIES. 



a. The Pioneer Stage. 



b. The Meadow Stage. 



c. The Shrub Stage. 



C. THE POND-BOG SOCIETIES. 



a. The Pond Societies. 



b. The Sphagnum Bog Society. 



VII. CONCLUSIONS. 



*In the spelling of this name Mr. Harvey has followed J. Hammond Trumbull, 

 William Willis and C. E. Potter, authorities on the Abscalka language; also 

 Thoreau, Dr. Chas. F. Jackson, and others. 



