Symphyotrichum oblongifolium (formerly Aster oblongifolius), commonly known as aromatic aster or oblong-leaved aster, is a species of flowering plant in the family Asteraceae and is native to parts of the eastern and central United States. It is an uncommon herbaceous perennial that reaches heights of 10–80 centimeters (4–31 inches) and blooms August–November with many flower heads in various shades of purple.