These wetlands are characteristically shallow, bowl-shaped depressions in gentle rolling plains. Some resemble prairie potholes. Occasionally, this inland wetland becomes a shallow lake. Cypress-gum swamps are wetlands usually found in the South. This swamp is an inland wetland, characterized by growth of large plant life, such as bald cypress, water tupelo and swamp tupelo.
Wet tundra is a wetland existing in much of Alaska.
This wetland is a treeless plain, found in arctic or subarctic regions. Tundra consists of a black mucky soil with a frozen subsoil, yet it is able to support a dense growth of flowering dwarf herbs. Many tropical forests are wetlands. The climate in these forests is continuously warm and humid and the annual rainfall may be over 100 inches. Because of the climate, lofty, broad evergreen trees grow abundantly and create a continuous canopy over the wetland area.