]> GH barcode-02069316 Canada Nova Scotia Butler's (Gavelton) Lake, Gavelton Bartonia virginica (Linnaeus) Britton, Stearn & Poggenburg (Linnaeus) Britton, Stearn & Poggenburg 2020-06-18 14:15:45 M. L. Fernald, B. H. Long & D. H. Linder