AN INTRODUCTION TO 



HISTORICAL 

 PLANT GEOGRAPHY 



BY 



E. V. WULFF 



Curator of the Herharium, Department of Geography of Cultivated 

 Plants, U.S.S.R. Institute of Plant Industry, Leningrad 



authorized translation hy ELIZABETH BRISSENDEN 



Foreword ty ELMER D. MERRILL 



Administrator of Botanical Collections, Harvard XJniveraity 



WALTHAM, MASS., U.S.A. 



PuDlisneo oy tne Cnronica Botanica Company 



