Silver maple, black willow, cottonwood, river birch. American elm once was a dominant tree. Dutch elm disease significantly reduced its numbers. In wet soils along an upland edge, river birch and swamp white oak dominant. As the stands mature, silver maple and elm invade.
Shrubs play a minor role.
Characteristic shrubs of the wet forest are eastern wahoo, buttonbush, and silky dogwood. The composition of the groundlayer varies from site to site due to the fluctuating water supply. In some cases, the development of the groundlayer is delayed until mid-August. A few late summer bloomers include calico aster, spotted jewelweed, green-headed coneflower, and late goldenrod. Spring blooming perennials are at a distinct disadvantage due to seasonal flooding.