Cedar is part of the English common name of many trees and other plants, particularly those of the genus Cedrus.
Some botanical authorities consider the Old-World Cedrus the only "true cedars". Many other species worldwide with similarly aromatic wood, including several species of genera Calocedrus, Thuja, and Chamaecyparis in the Pacific Northwest of North America, are referred to as "false cedars".
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Cryptomeria (literally "hidden parts") is a monotypic genus of conifer in the cypress family Cupressaceae. It includes only one species, Cryptomeria japonica (syn. Cupressus japonica L.f.). It is considered to be endemic to Japan, where it is known as Sugi (杉). The tree is also called Japanese cedar or Japanese redwood in English. It has been extensively introduced, and cultivated for wood production on the Azores and elsewhere.