References: 

• Catling, P.M., B. Freedman & Z. Lucas. 1984. The vegetation and phytogeography of Sable Island, Nova Scotia. Proceedings of the Nova Scotian Institute of Science 34: 181-248.

• Zinck, M. 1998. Roland's Flora of Nova Scotia, 3rd Ed.  Nimbus Publishing and the Nova Scotia Museum, Halifax, NS.

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