Synonym:  Aster tradescantii  L.
     Synonym:  Aster saxatilis (Fernald) Blanch.
     Synonym:  Aster vimineus Lam. var. saxatilis Fernald

              

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Plants of streambanks and shores, often among rocks or gravel. Flowers July to late August.  Native..

Perennials.  Stems are solitary or clustered from short rhizomes, straight to slightly bent at the nodes; glabrous below, becoming pubescent in lines upward.  Typical height 6-24 inches.

The overall inflorescence is often peaked, branching from mid-stem upwards.  Branches are ascending, never recurved at the tip.  Flower heads are relatively few per branch, neither crowded nor one-sided along branches.

Flower heads are radiateRay florets average 14-27 per head; corollas white. Disc florets average 20-30 per head, corollas pale yellow, creamy white or translucent, turning magenta with age.  Lobes of disc corollas are spreading, comprising from 30-45% of corolla limbs. Involucral bracts are well-appressed, glabrous.  Dark green zones are oblanceolate or diamond-shaped.

Basal leaves may be present at flowering.  Stem leaves are lance-linear or narrowly oblanceolate, ascending, glabrous.  Branch leaves are few, similar to stem leaves, but smaller.

Similar species include Symphyotrichum lateriflorum.

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