Department of Biology
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Azure Aster or Skyblue Aster
Symphyotrichum oolentangiense (Riddell) Nesom is native to open, dry, sandy, loamy, or rocky soils, dry to wet (seasonally drying) prairies, alvars, glades, bluffs, dunes, barrens, open deciduous woods, oak and/or pine savannahs in eastern North America (Brouillet et al. 2006; FNA). The species was known as Aster azureus Lindley for a long time but the name Aster oolentangiensis Riddell is slightly older and has nomenclatural priority.
Symphyotrichum oolentangiense, large plant, Semple & Chmielewski 5196 WAT, Wisconsin
Symphyotrichum oolentangiense, heads, Glen Morris, Ontario
Symphyotrichum oolentangiense, fruit, Semple 2477 WAT, Ontario
Symphyotrichum oolentangiense, pappus bristle tips, Semple 2477 WAT, Ontario
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 13 May 2021 by J.C. Semple
© 2021 J.C. Semple, including all photographs unless otherwise indicated