Symphyotrichum chilense (formerly Aster chilensis) is a species of flowering plant in the family Asteraceae known by the common names Pacific aster and common California aster. It is native to the west coast of North America from British Columbia to Southern California and the Channel Islands. It grows in many habitats, especially along the coast and in the coastal mountain ranges. Despite its scientific name, it does not occur in Chile. Pacific aster blooms from June to October with violet ray florets surrounding yellow disk florets.
Symphyotrichum chilense is a rhizomatous, perennial, herbaceous plant growing to heights between 40and. The sparsely hairy leaves are narrowly oval-shaped, pointed, and sometimes finely serrated along the edges. The inflorescence holds flower heads that open June–October with centers of yellow disk florets surrounded by narrow violet ray florets. The fruit is a seed, specifically a rounded, hairy cypsela with pappi.
Pacific aster is native to west coast provinces and states of North America in British Columbia; California, including Southern California and the Channel Islands; Oregon; and, Washington. Despite its scientific name, it does not occur in Chile.
It can be found in coastal habitats including salt marshes, ocean dunes and banks, grasslands, and coniferous forests, at elevations of NaNm (-2,147,483,648feet).