Arkansas is a landlocked state in the South Central region of the United States, home to more than three million people as of 2018. The state's diverse geography ranges from the mountainous regions of the Ozark and Ouachita Mountains, which make up the U.S. Interior Highlands, to the densely forested land in the south known as the Arkansas Timberlands, to the eastern lowlands along the Mississippi River and the Arkansas Delta.
Arkansas's temperate deciduous forest is divided into three broad ecoregions: the Ozark, Ouachita-Appalachian Forests, the Mississippi Alluvial and Southeast USA Coastal Plains, and the Southeastern USA Plains. The state is further divided into seven subregions: the Arkansas Valley, Boston Mountains, Mississippi Alluvial Plain, Mississippi Valley Loess Plain, Ozark Highlands, Ouachita Mountains, and the South Central Plains. A 2010 United States Forest Service survey determined 18,720,000 acres of Arkansas's land is forestland, or 56% of the state's total area. Dominant species in Arkansas's forests include Quercus, Carya, Pinus echinata and Pinus taeda,
Arkansas's plant life varies with its climate and elevation. The pine belt stretching from the Arkansas delta to Texas consists of dense oak-hickory-pine growth. Lumbering and paper milling activity is active throughout the region. In eastern Arkansas, one can find Taxodium, Quercus nigra, and hickories with their roots submerged in the Mississippi Valley bayous indicative of the deep south. Nearby Crowley's Ridge is the only home of the tulip tree in the state, and generally hosts more northeastern plant life such as the beech tree. The northwestern highlands are covered in an oak-hickory mixture, with Ozark white cedars, cornus, and Cercis canadensis also present. The higher peaks in the Arkansas River Valley play host to scores of ferns, including the Woodsia scopulina and Adiantum on Mount Magazine.