is a specific kind of: angiospermous tree, flowering tree.

is a broader term that covers: common white dogwood, Cornus florida, eastern flowering dogwood | American dogwood, Cornus stolonifera, red dogwood, red osier, red osier dogwood, redbrush | Cornus obliqua, silky dogwood | Cornus amomum, silky cornel, silky dogwood | blood-twig, common European dogwood, Cornus sanguinea, pedwood, red dogwood | bunchberry, Cornus canadensis, crackerberry, dwarf cornel, pudding berry | cornelian cherry, Cornus mas.

is a member of: Cornus, genus Cornus.

contains: dogwood.