Symphyotrichum plumosum (formerly Aster plumosus) is a species of flowering plant in the family Asteraceae endemic to Florida in the United States. Commonly known as plumose aster, it is a perennial, herbaceous plant that may reach 40 to 100 centimeters (1+1⁄4 to 3+1⁄4 feet) tall. Its flowers have rose-purple ray florets and yellow turning to purple disk florets. It is of conservation concern.