The larvae feed on "Gaillardia pulchella". Other ornamentals such as "Helenium", "Gaillardia", and "Eriophyllum "also suppress "P. penetrans". "Gaillardia aristata" grows in many habitats. "Gaillardia coahuilensis" grows in calcareous soils. The butterflies eat from green rabbitbrush, "Chrysothamnus viscidiflorus", asters, yarren, and gaillardia. Some natives, such as "Gaillardia grandiflora" and "Lupinus sericeus", are resistant to catechin-induced toxicity. "Gaillardia amblyodon " grows in open, sunlit locations on sandy soils. "Gaillardia spathulata" grows in clay sandy washes often in desert regions. "Gaillardia arizonica" grows in sandy washes and alluvial deposits in desert regions. Gaillardia amblyodon, the maroon blanketflower, is a species of flowering plant in the aster family. Gaillardia spathulata, the western blanketflower, is a species of flowering plant in the sunflower family. Gaillardia arizonica, the Arizonia blanketflower, is a species of flowering plant in the sunflower family. "Gaillardia aristata" is a widely cultivated ornamental plant, used as a perennial garden flower.