E = evergreen; N = native to Maine Shrubs: Cephalanthus occidentalis N Buttonbush Clethra alnifolia N Summersweet Cornus racemosa N Gray Dogwood Cornus sericea N Redosier Hamamelis virginiana N Common Witchhazel Ilex verticillata N Winterberry Viburnum dentatum N Arrowwood Herbaceous Perennials: Aquilegia canadensis N Columbine Asclepias incarnata N Swamp Milkweed Caltha palustris N Marsh Marigold