"Taxodium" is a genus of coniferous trees in the family Cupressaceae. It includes three species: the Bald Cypress (T. distichum), the Pond Cypress (T. ascendens), and the Dawn Redwood (T. dipterocarpum). These trees are native to southeastern North America and southern China. They are characterized by their distinctive "knees" or root projections that grow above the waterline in wetland environments, and by their flat, feathery leaves that turn a coppery color in the fall. The wood of Taxodium species is rot-resistant and has been used for various purposes, including construction and boat-building.