Symphyotrichum oolentangiense

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).  Ray floret straps are pale to azure blue to violet-purple, rarely rosy, white or bluish white. 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. The species is tetraploid (2n=32) throughout its range.

Brouillet, L., J.C. Semple, G.A. Allen,  K. Chambers and S. Sundberg. 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.

Last revised 14 May 2025 by J.C. Semple

© 2025 J.C. Semple, including all photographs unless otherwise indicated