Abstract: Several incidental reports have already appeared as the result of studies inade in connection with the general problems of this overall survey of the area.The present report is made in an effort to pr6vide a summary description of the regions most intensively worked, and a preliminary outline of the more important habitats represented therein.It is hoped that this will avoid duplication of effort in the FLINT -CHATTAHOOCHEE --APALACHICOLA REGION 3 preparation of the various special reports which will appear subsequently.This account. is provisional, pending acquisition of more accurate and detailed information about the plant habitats (see below) and more data on the fauna.It is based upon: (1) various published regional descriptions, ci ted in the bibliography of this report, especially Braun's Deciduous Foyests of Eastern North America ( 1950); (2) manuscript notes on the plant habitats of the limestone area of southwestern Georgia, by Robert F. Thorne; (3) field 6bservations and notes by J. S. Rogers and T. H. Hubbell, made at intervals over a period of 25 years; (4) lists of 'the principal plant species in the numbered field stations set up in 1953,• made by A. M. Laessle while visiting the stations with Hubbell; and (5) independent observations by the authors during the years 1953-1955.Thorne made a detailed field study of the flora and plant associations of southwestern Georgia while working at the Emory University Field Station near Newton, Georgia, in the angle between the Flint and the Chattahoochee rivers.He writes• (in lit.) that this work was clone "with a view to learning as much as possible about the flora of the region to be flooded," and that the manuscript notes mentioned under (2) above are a "rough and oversiniplified treatment" based _upon a detailed classification and description of the plant habitats in a manuscript that awaits publication.The planned completion of the field work and publication of this paper will furnish students of the biota with a much needed foundation for their ecological studies. PHYSICAL FEATURES AND NA-rURAL REGIONSA circle drawn with a 25-mile radius around the Jim Woodruff Dam as its center (Map I) includes not only all of the bottomland that will be Rooded, but also parts of all the natural.regions that adjoin or Closely approach the impoundment basin.With .thetown of Chattahoochee near the center, the circle pasies not far beyond Donalsonville and Bainbridge in Georgia, and Quincy, Bristol, Blountstown and Marianna in Florida.It includes the southeast corner of Houston County, Alabama, almost all of Seminole and more than half of Decatur County, Georgia, and in Florida most of Gadsden and parts of Liberty, Calhoun and Jackson Counties.The circle is unevenly tri-sected by the Flint and Chattahoochee Rivers and the Apalachicola, product of their confluence.The area covered by this survey is completely within the "Southeastern Evergreen Ferest Region" of Braun (1950).