The landscape of Necedah, Ho Chunk for "land of yellow waters", was formed by retreating glaciers ten thousand years ago creating the vast peat bogs and sand-ridges of Necedah. Peat bogs evolved into wetlands, prairie communities and Shrub Carr dominated by tall shrubs. Sedge meadows are open wetlands dominated by sedges and grasses. There are several common subtypes: tussock meadows, dominated by tussock sedge, and the grass bluejoint, broad-leaved sedge meadows, dominated by the robust sedges Carex species, wire-leaved sedge and few-seeded sedge. Also frequent are marsh bluegrass, manna grasses, panicled aster, joe-pye-weed, and the bulrushes.
Enter: Wetland

The prairie communities can be divided into wet prairie, wet mesic, mesic prairie, dry mesic and dry prairie. At Necedah the wet prairie and wet mesic prairie predominate. In the wet prairie, bluejoint grass, prairie cord grass, marsh wild timothy grow with black eyed susan, mountain mint, golden rod, aster and meadow rue, sawtooth sunflower. In the Wet mesic prairie big blue stem, bluejoint grass canada wild rye, prairie panic grass grows with asters, black eyed susan, mountain mint, meadow anemone, prairie blazing star, prairie flocks, purple meadow rue, saw tooth sunflower, switch grass, wild bergamot and yellow coneflower.
Enter: Prairie

The ancient glacial sand deposits of Necedah evolved into savanna, pine barrens and southern upland forest. Savannas are partially forested upland communities, maintained by fire with a strong prairie or barrens component in the understory. Oaks as bur oak, black oak are the most common trees of canopy with jack and red pine of the pine barrens. Beneath the canopy, herbaceous bluestem and grama grasses are dominant with a mix of bracken fern and scrub oak in the understory. The oak savannas of the Midwestern United States form a transition zone between the western Great Plains and the eastern broadleaf and mixed forests.
Enter: Savanna