Boltonia diffusa (smallhead doll's daisy) is a North American species of plants in the sunflower family. It native to the United States, primarily the states along the Gulf of Mexico from Texas to Florida plus the lower Mississippi Valley from Louisiana to Illinois. There additional populations in the eastern United States as far north as Virginia. Varieties * Boltonia diffusa var. diffusa - coastal regions and Mississippi Valley * Boltonia diffusa var. interior Fernald & Griscom - Mississippi Valley