""'Thuja occidentalis " "', also known as "'northern white-cedar "'or "'eastern arborvitae "', is an evergreen coniferous tree, in the cypress family Cupressaceae, which is native to eastern Canada and much of the north, central and upper Northeastern United States, but widely cultivated as an ornamental plant.
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According to the same author, the following families are well represented : Magnoliaceae, Lauraceae, Ranunculaceae, Berberidaceae, Hamamelidaceae, Fagaceae, Betulaceae, Juglandaceae, Caryophyllaceae, Chenopodiaceae, Polygonaceae, Plumbaginaceae, Theaceae, Salicaceae, Brassicaceae, Ericaceae, Primulaceae, Malvaceae, Euphorbiaceae, Thymelaeaceae, Rosaceae, Fabaceae, Cornaceae, Araliaceae, Apiaceae, Rhamnaceae, Gentianaceae, Boraginaceae, Scrophulariaceae, Lamiaceae, Campanulaceae, Asteraceae, Liliaceae, Iridaceae, Orchidaceae, Juncaceae, Cyperaceae, Poaceae, Pinaceae, Cupressaceae, Aspleniaceae, Polypodiaceae.
