References

 

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Noyes, R.D. and L.H. Rieseberg.  1999.  ITS Sequence Data Support A Single Origin for North American Astereae (Asteraceae) and Reflect Deep Geographic Divisions in Aster S.L.  American Journal of Botany 86(3): 398–412.

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Semple, J.C., S.B. Heard and L. Brouillet.  2002.  Cultivated and Native Asters of Ontario (Compositae: Astereae).  University of Waterloo, Waterloo, Ontario.

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