Giant sequoia (Sequoiadendron giganteum) belong to the family Taxodiaceae (the Bald cypress family). It is sole living species in the genus Sequoiadendron. It is a large tall, evergreen tree that is native to California in the United States. This tree grows on the western slopes of the Sierra Nevada Mountains, and it can reach 50-85 m in height and 6-8 m in diameter. It is the world's largest single tree by volume. The bark is fibrous, furrowed, and may be 90 cm thick at the base of the columnar trunk. The leaves are evergreen, awl-shaped, 3–6 mm long, and arranged spirally on the twigs. The cones are 4–7 cm long and mature in 18–20 months, though they typically remain green and closed for up to 20 years.