The Lumber River floodplain is largely a second-growth oak-cypress-gum swamp forest of the blackwater subtype. Most of the species present are indicators of the perennially wet nature of the river floodplain. The major canopy species are cypress, tupelo, red gum, black gum, and water oak; the understory is dominated by river birch, water elm, red maple and hackberry. Along the river banks are abundant pines, cypress, poplar, bays, juniper, gums and wisteria.
