Red-osier Dogwood (Cornus sericea). Cornaceae. September 18, 2019 1500 × 1000 NY Wildflowers Gallery Native. Meadows, fields, tidal marshes, swamps. Throughout. White flowers and white-to-bluish berries. Montauk, Oct 2011. Native. Meadows, fields, tidal marshes, swamps. Throughout. White flowers and white-to-bluish berries. Montauk, Long Island, October 2011.