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.
Peltandra sagittifolia Peltandra sagittifolia is a species of plant in the genus "Peltandra". It is commonly known as the spoonflower or the white arrow arum, native to the southeastern United States from eastern Louisiana to eastern Virginia.