Chamaecyparis thyoies (Atlantic White Cypress or Atlantic Whitecedar), is a species of Chamaecyparis, native to the Atlantic coast of North America from Maine south to Georgia, with a disjunct population on the Mexican Gulf coast from Florida to Mississippi. It grows on wet sites on the coastal plain at altitudes from sea level up to 50 m, more rarely in the foothills of the Appalachian Mountains up to 460 m altitude. The name is also sometimes wrongly cited as "Atlantic White Cedar", a name rejected by the American Joint Committee on Horticultural Nomenclature as it is a cypress, not a cedar.