FLORISTIC FEATURES OF A PRAIRIE PROVINCE 3Sy 



Stevenson, W. H., Christie, G. I., Wilcox, O. W., Principal Soil Areas 



of Iowa. 

 Schimper, A. F. W., Plant Geography Upon a Physiological Basis, 



Engl. Trans. Ed. Oxford, 1903. 

 Warming, Oecology of Plants, Eng. Trans. Oxford, 1909. 



Department of Botany, 



TowA State College. • . ' 



