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Symphyotrichum ontarionis var. glabratum

Symphyotrichum ontarionis var. glabratum (Semple) L. Brouillet & Bouchard  
Family: Asteraceae
[Aster ontarionis var. glabratus Semple]
Symphyotrichum ontarionis var. glabratum image
  • FNA
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Luc Brouillet, John C. Semple, Geraldine A. Allen, Kenton L. Chambers, Scott D. Sundberg+ in Flora of North America (vol. 20)
Leaves: abaxial faces glabrous or glabrate. 2n = 32.

Flowering Jul-Aug. Alluvial stream shores; 10-200 m; Ont., Que.; Mich.

Variety glabratum reaches farther north in Ontario and Quebec than does var. ontarionis, as far as the Clay Belt and streams of the James Bay basin. It may be present in Minnesota and Wisconsin. It may be confused with Symphyotrichum tradescantii, which is mostly allopatric. It is distinguished from the latter by its more deeply lobed disc corollas.

Symphyotrichum ontarionis var. glabratum image
Symphyotrichum ontarionis var. glabratum image
Symphyotrichum ontarionis var. glabratum image
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