Synonym:  Aster praealtus  Poir.
    
Synonym:  A. salicifolius  Aiton 1789, not Lamarck 1784

              

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Perennials.  Colony forming from long, creeping rhizomes.  Stems are glaucous, often reddish, glabrous toward the base, but becoming pubescent in lines upwards.  Typical plant height is 3 to 5 ft. (9 to 15 dm).

The overall inflorescence is panicle-like, often peaked.  Branches are ascending to spreading, bear several to many flower heads, and are not arranged one-sided on branches.

Flower heads are radiate.  Ray florets are pale blue-violet, varying to nearly white, pistillate and fertile.  Disc florets are yellow, turning reddish with age.  Involucral bracts are appressed to slightly spreading.  Dark green zones are oblanceolate, widest toward the apex, tapering to a narrow band along the involucral bract midvein.

Basal, lower and sometimes also mid-stem leaves are usually deciduous by flowering.  Mid- to upper stem leaves are oblanceolate or lance-linear, not borne on petioles, and have margins that are slightly curled under.  Leaf veins form isodiametric aereolae (i.e., approximately equilateral sides.

Plants of thickets, damp meadows and roadsides.  Flowers mid-September to mid-October.  Native..

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Similar species:  Symphyotrichum lanceolatum, S. firmum

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