Cornus × arnoldiana
Cornus × arnoldiana, the Arnold dogwood, is a hybrid dogwood native to eastern North America. It is reported from Ontario, Missouri, Ohio, Pennsylvania, and Massachusetts. It is a member of the dogwood genus Cornus and the family Cornaceae.
Arnold dogwood is derived from natural crosses between silky dogwood and gray dogwood. Intermediate shrubs were first noted in the Arnold Arboretum by Alfred Rehder, who described and named the hybrid. The name is an allusion to the place of its discovery.