Photo: Peter Sekely, Mariposa Grove
Sequoia = a redwood tree, especially the California redwood
Treetop science: Measuring the changing climate’s effects on California sequoias – CBS
Planting a ‘Trail of Giants’ – The Atlantic
National Park Sites On List Of Landscapes At Risk From Climate Change
Wikipedia: Giant sequoia specimens are the most massive trees on Earth. The common use of the name sequoia usually refers to Sequoiadendron giganteum, which occurs naturally only in groves on the western slopes of the Sierra Nevada Mountains of California. The oldest known giant sequoia is 3,200-3,266 years old. Sequoiadendron giganteum is the sole living species in the genus Sequoiadendron, and one of three species of coniferous trees known as redwoods, classified in the family Cupressaceae in the subfamily Sequoioideae, together with Sequoia sempervirens (coast redwood) and Metasequoia glyptostroboides (dawn redwood).