Symphyotrichum tradescanti

Tradescant’s Aster, Shore Aster, aster de Tradescant

Symphyotrichum tradescantii (L.) Nesom occurs scattered along damp, rocky and gravelly shores, silt- or loam-filled cracks in rocky rapids of streams or along freshwater estuaries in Newfoundland, Québec, and New Brunswick in Canada and from Maine to New York and northern New Jersey in the US (Brouillet et al. 2006; FNA). Rays are white; disc florets are pale yellow turning purplish with age, corolla lobes are shorter than in Sy. lateriflorum. Colonial dams on rivers likely eliminated many populations in the southern portion of the range long ago.

Symphyotrichum tradescanti 4900 NB

Symphyotrichum tradescanti, plants on rocky shore, Semple & Keir 4900 WAT, New Brunswick

Symphyotrichum tradescanti 3395 PQ 1

Symphyotrichum tradescanti, dwarf plant on rocks along shore of St. Lawrence R., Semple & Brouillet 3395 WAT, Québec

Symphyotrichum tradescanti stem 4860 NS

Symphyotrichum tradescanti, stem and leaves, Semple & Keir 4860 WAT, Nova Scotia

Brouillet, L., J.C. Semple, G.A. Allen, K. Chambers and S. Sundburg. 2006. Symphyotrichum Nees. pp. 465-539. In Flora North America Editorial Committee, eds. Flora of North America. Vol. 20. Asteraceae, Part 2. Astereae and Senecioneae. Oxford University Press, New York.

Revised 14 May 2021 by J.C. Semple