He introduced Pavia rubra, Cornus florida, and other plants. Flowering dogwood ("Cornus florida") blooms in early spring. "Hexastylis" spp., "Chimaphila maculata", and "Cornus florida". Flowering dogwood ("Cornus florida") is a common understory tree. Species affected&colon; "Cornus florida" and "Cornus nuttallii". Understory shrubs include flowering dogwood ("Cornus florida") and American holly ("Ilex opaca").