University of Arkansas Herbarium
Biota of North America Program
Texas A&M University Bioinformatics Working Group
Arkansas Biodiversity - Vascular Plants
This is a reduced, annotated version of the full sized topographic image available from Ray Sterner's Color Landform Atlas of the United States. A nice, color-enhanced satellite image of the state is also available from this source. Arkansas landforms and natural areas are also defined by a landform elevation map available through the Arkansas Archeological Survey.

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