Water tupelo and bald cypress trees can live in deep water for long periods. After taking root in summer when the swamp is nearly dry, the seedlings can stay alive in water deep enough to kill other plants. This trail leads to an abandoned river channel. As the channel fills with silt and vegetation, black willow, sycamore, red maple and other trees will gradually replace the bald cypress and tupelo. Don't hurry, the change will take several hundred years.
For more information about visiting Cypress Swamp, Natchez Trace follow the link-
http://www.nps.gov/natr/planyourvisit/jackson-to-tupelo.htm
Cypress Swamp, at milepost 122.0, is a self guiding trail through a water tupelo/bald cypress swamp. The terrain along Natchez Trace Parkway changes from 70 to 1,100 feet in elevation and passes through 5 degrees of latitude.