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.
Stonebergia Stonebergia is an extinct genus in the rose family Rosaceae which contains the single species Stonebergia columbiana. The genus was described from a series of isolated fossil leaves in shale from an early Eocene location in southern British Columbia.