 "U. grandiflora" also differs from "Uvularia perfoliata," which occurs in eastern North America.The latter has similar large perfoliate leaves, but the flowers have orange-colored bumps on the petals.The native range of "Uvularia grandiflora" extends from the Appalachians west to the Dakotas, Kansas and Oklahoma, from Louisiana and Georgia in the South to Manitoba, Ontario and Quebec in Canada.