Are Petrophytum and Townsendia both in the rose family?
Townsendia Townsendia is a genus of North American plants in the aster tribe within the daisy family.
Halesia tetraptera Halesia tetraptera, commonly known as the common silverbell or mountain silverbell (or Carolina silverbell; syn. "Halesia carolina" auct. non L.), is a species in the family Styracaceae, native to the southeastern United States. It is cultivated as an ornamental tree.