*PF06F, PF02F, PF02G

The swamp communities of Illinois are the northernmost remnant  of vast network that once covered much of the southern United States. Many  plant and animal species that occur here are at the northernmost edge of their range.

The characteristics of this community are the presence of permanent to semipermanent water, and a greater than 30 % areal canopy cover of tall (over 20 feet) woody vegetation.  In many areas, the canopy cover exceeds 80%. The dominant trees include bald cypress, some more than 1,000 years old, with knees up to 10 feet high.  These trees typically occur as scattered individuals, or in small groves.

The classification code PF06F represents a mixed class and is only used in areas where broad-leaved and needle-leaved deciduous trees cannot be distinguished on aerial photography; for example, where bald cypress and water tupelo trees are growing together in  approximately equal numbers.

The soils in this community consist of silt and clayey materals. They range in reaction from very strongly acid to neutral.  The major soils include undrained phases of Okaw silt loam, Darwin silty clay, and Jacob clay.

*Used throughout the community descriptions to indicate the most commonly occurring code in Illinois