Service, and to the State Geological Survey which is conducted in 

 such active cooperation with the Maryland Weather Service in the 

 investigation of the natural resources of the State. Aid has been 

 rendered in the preparation of the present report by the officers of 

 the TJ. S. National Herbarium and various other national bureaus 

 such as the U. S. Weather Bureau, the TJ. S. Geological Survey, and 

 the Bureau of Soils of the U. S. Department of Agriculture which 

 have continued to actively cooperate with the State bureaus. 



The Introduction to the present volume prepared by Forrest 

 Shreve and constituting Part I, is devoted to a summary of the 

 climatic factors of temperature, humidity, rainfall, and winds upon 

 which plant growth depends; upon the topography of the State and 

 its relation to vegetation and upon mineralogy ami soils of Maryland 

 and their bearing upon plant growth. 



The chapter on the Floristic Plant Geography of Maryland, which 

 forms Part II of the volume has also been prepared by Forrest 

 Shreve and embraces a discussion of the distribution of the Maryland 

 Flora both inside and outside the State. 



The several chapters on the Ecological Plant Geography of Mary- 

 land, forming Part III of the volume, have been prepared by Forrest 

 Shreve, M. A. Chrysler, and Frederick II. Blodgett, the former 

 discussing the Eastern Shore, the Lower Midland, and the Mountain 

 districts while Mr. Chrysler describes the Western Shore District and 

 Mr. Blodgett the Upper Midland District. 



The Relation of Natural Vegetation to Crop Possibilities by 

 Forrest Shreve forms Part IV of the volume and discusses features 

 of much interest to the agriculturalists of the State. 



Part V by Frederick II. Blodgett treats of the Agricultural 

 Features of Maryland, and embraces a full discussion of the agricul- 

 tural practise and the chief agricultural products of the State. 



The Forests and Their Products by F. W. Besley, the State 

 Forester, forms Part VI of the volume and Part VII consists of an 

 annotated List of Plants Collected or Observed compiled by Forrest 

 Shreve. 



Mr. E. W. Berry of the State Geological Survey, has rendered 

 efficient service in the publication of the present volume by editing 

 the manuscripts presented and in supervising their passage through 

 the press. 



