Are Petrophytum and Townsendia both in the rose family?
Petrophytum Petrophytum (orth. var. Petrophyton) is a small genus of plants in the rose family known as the rock spiraeas or rockmats. These are low mat-forming shrubs which send up erect stems bearing spike inflorescences of flowers. The brushy flowers are white and have many stamens and hairy, thready pistils. Rockmats are native to western North America.
Claytonia tuberosa Claytonia tuberosa, commonly known as tuberous springbeauty, is a species of flowering plant in the family Montiaceae. It is a perennial mostly found in North America to East Asia–Siberia. The perennial can grow to a height of 15 cm and bears hermaphrodite flowers.