The Madigan Salt Creek bottomlands contain one of Illinois's largest American sycamore trees. Outside the creek bed, the conservation area contains several groves of white oak and hickory, typical of central Illinois.
In the context of the Madigan Salt Creek conservation area, a notable feature is a large American sycamore tree situated within the bottomlands. Additionally, the area's diverse landscape includes clusters of white oak and hickory trees, which are characteristic of central Illinois.