[Asters: The Genus Symphyotrichum West of the Cascade Mountains of Oregon and Washington]

Hall's Aster

Symphyotrichum hallii

Synonyms: Aster chilensis, Aster chilensis ssp. hallii, Aster hallii

Flower head of Hall's Aster: Symphyotrichum hallii (Synonyms: Aster chilensis, Aster chilensis ssp. hallii, Aster hallii) - Flower head of Hall's Aster: Symphyotrichum hallii (Synonyms: Aster chilensis, Aster chilensis ssp. hallii, Aster hallii)

Involucral bracts of Hall's Aster: Symphyotrichum hallii (Synonyms: Aster chilensis, Aster chilensis ssp. hallii, Aster hallii) - Inflorescence of Hall's Aster: Symphyotrichum hallii (Synonyms: Aster chilensis, Aster chilensis ssp. hallii, Aster hallii)

Close-ups of the flower heads and inflorescence of Hall's aster, Multnomah County, Oregon............September 8, 2015.

Flower head of Hall's Aster: Symphyotrichum hallii (Synonyms: Aster chilensis, Aster chilensis ssp. hallii, Aster hallii) - Hall's Aster: Symphyotrichum hallii (Synonyms: Aster chilensis, Aster chilensis ssp. hallii, Aster hallii)

Stem leaves of Hall's Aster: Symphyotrichum hallii (Synonyms: Aster chilensis, Aster chilensis ssp. hallii, Aster hallii) - Flower heads, buds and stem leaves of Hall's Aster: Symphyotrichum hallii (Synonyms: Aster chilensis, Aster chilensis ssp. hallii, Aster hallii)

Close-ups of the flower heads and stem leaves of Hall's aster, Multnomah County, Oregon............August 6, 2012.
Paul Slichter