54 THE ECOLOGY OF LEAVES 



REFERENCES 



Coulter, J. M., Barnes, C. R., and Cowles, H. C: A Text-book of Botany, 



Vol. II. Ecology, Chapter II. Leaves, American Book Company, 1911. 

 Clements, E. S.: Relation of Loaf Structure to Physical Factors, Trans. Am. 



Micro. Soc, 26, 19-102, Pi. 1-9, 1904. 

 Hanson, Herbert C: Leaf-structure as Related to Environment, Am. Jour. 



Bot., 4, 533-560, Fig. 1-21, 1917. 

 Harshberger, John W.: The Vegetation of the New Jersey Pine Barrens. 



Chapter XVIII. Leaf Forms of Pine Barren Plants, and Chapter XIX, 



Microscopic Leaf Structure, Philadelphia, Christopher Sower Company, 1916. 

 Hayden, Ada: The Ecologic Foliar Anatomy of Some Plants of a Prairie 



I^rovince in Central Iowa, Am. Jour. Bot., 6, 69-85, 1919. 

 Starr, Anna M.: Comparative Anatomy of Dune Plants, Bot. Gaz., 54, 265- 



306, 1912. 

 Stober, J. P. : A Comparative Study of Winter and Summer Leaves of Various 



Herbs, Bot. Gaz., 63. 89-109, 1917. 



