Symphyotrichum vahlii (formerly Aster vahlii and Erigeron vahlii) is a species of flowering plant in the family Asteraceae native to South America, specifically the countries of Bolivia, Chile, and Argentina, and on the Falkland Islands. It is herbaceous and grows 10 to tall. Its flowers have white ray florets of length 6 mm. It grows in wetland areas of tall forests with trees that exceed 15 m. One infraspecies is accepted, Symphyotrichum vahlii var. tenuifolium, in addition to the autonym S. vahlii var. vahlii.

 Symphyotrichum vahlii is herbaceous and grows 10 to tall. Its flowers have white ray florets of length 6 mm.

Taxonomy: One infraspecies is accepted, Symphyotrichum vahlii var. tenuifolium, in addition to the autonym S. vahlii var. vahlii.

Distribution and habitat: The species is native to South America, specifically the countries of Bolivia, Chile, and Argentina, and on the Falkland Islands. It grows in wetland areas of tall forests with trees that exceed 15 m.