In Gussarova's 2017 paper on Euphrasia (page 290), she includes this sentence about the range of Euphraisa farlowii, which indicates she only reported it from the Island:
"Flowering mid summer–fall. Dry, grassy habitats on sandstone or limestone barrens, rocks, ledges, sand beaches; 0–300 m; N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I.; Maine."
Unless you have specimens of Euphrasia farlowii from Labrador, Labrador should be removed from its range.
In Gussarova's 2017 paper on Euphrasia (page 290), she includes this sentence about the range of Euphraisa farlowii, which indicates she only reported it from the Island:
"Flowering mid summer–fall. Dry, grassy habitats on sandstone or limestone barrens, rocks, ledges, sand beaches; 0–300 m; N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I.; Maine."
Unless you have specimens of Euphrasia farlowii from Labrador, Labrador should be removed from its range.