The plants in the swamp's understory include arrow-wood, silky dogwood, and winterberry. Viburnums, winterberry, blueberry, serviceberry, Virginia rose, and male berry comprise much of the shrub understory. The shrub layer included buttonbush, winterberry, poison ivy, wild rose. The name "mountain holly" is also sometimes used for the related mountain winterberry ("Ilex montana"). These trees are common in the shrub layer, along with others, including blueberries and winterberry. The route continues in the Refuge as Winterberry Way and Powerline Trail. There is a visitor center located in the northern section, on Winterberry Way. Winterberry Park built in 1725 by Thomas Archer is on the parish borders. Although wet acidic soils are optimal, the winterberry will grow well in the average garden. "Winterberry" earned one battle star for World War II. During the waning months of World War II, "Winterberry" continued to serve at Okinawa.