136 Proceedings of the Ohio State Academy of Science. 



36. Harper, Roland M. 



Preliminary report on the peat deposits of Florida, 3rd 

 Ann. Kept. Florida Geol. Survey, 199-373, 1910. 



■^y. Henslow, G. 



The origin of plant structures by self-adaptation to the 

 environment exemplified by desert or xerophilous plants. 

 Jour. Linn. Soc. Botany, 30 : 1894. 



38. Jaccard, p. 



Gesetze der Pflanzenvertheilung in der Alpinen Reg- 

 ionen. Flora go : 349-377. 



39. Jennings, O. E. 



An ecological classification of the vegetation of Cedar 

 Point. Ohio Nat. 8 : 291-340, Apr., 1908. 



40. 



A botanical survey of Presque Isle, Erie Co., Pa. Ann. 

 Carnegie Mus. 5: 289-421, May, 1909. 



41. Karsten, G. and Schenck, H. 



Vegetationsb'ilder. Series 17, pt. 8, Jena, 1910. 



42. Kearney, T. H. 



A report on a botanical survey of the Dismal Swamp 

 region. Contr. Nat. Herb. 5: 367-395, 1901. 



43. Leverett, F. 



Glacial formations and drainage features of the Erie and 

 Ohio basins. U. S. Geol. Survey, Mon. 41, 1902. 



44. Livingston, B. E. 



Physiological properties of bog water. Bot. Gaz. 39 : 

 348-355, May, 1905. 



45- 



The relation of desert plants to soil moisture and to 



evaporation. Carnegie Inst. Washington Pub., 50:20, 



1906. 



46. MacMillan, Conway 



Observations on the distribution of plants along the 



shore of the Lake of the Woods. Minn. Bot. studies. 



Bull. Minn. Geol. and Nat. Hist. Survey, 9 : 949-1023, 



1897. 



