Forests consist of oaks, hickories and eastern red cedars.
They support a lush growth of woodland wildflowers and ferns. Some relicts of the last continental glacier, including northern white cedar, white pine and Canada yew, a slow growing evergreen that may live to be 150 years old, may be found among the bluffs. Tallgrass prairie restoration projects add to the diversity. The sandy prairie soil grows prickly pear cactus alongside the more typical prairie wildflowers. In autumn, watch the roadsides for vast flocks of red-winged blackbirds and grackles.