Genus containing a sole living species of hardy, fast-growing evergreen, coniferous tree originating from coastal forest habitat in California and Oregon, USA. This genus is closely related to the genera Sequoiadendron and Metasequoia and contains the tallest tree species in the world. Possessing thick, soft, fuzzy bark and yew-like foliage reduced to needle-like scales. Also called California redwood, this species is typically grown for its impressive stature and fast growth, best planted somewhere spacious. Grows optimally in climates with cool, damp summers and is resistant to pollution and wind so may be planted in exposed positions.