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Populus trichocarpa, the black cottonwood, [1] western balsam-poplar [2] or California poplar, is a deciduous broadleaf tree species native to western North America. It is used for timber , and is notable as a model organism in plant biology .
Populus fremontii, commonly known as Frémont's cottonwood, [1] is a cottonwood (and thus a poplar) native to riparian zones of the Southwestern United States and northern through central Mexico. [2] It is one of three species in Populus sect. Aigeiros. The tree was named after 19th-century American explorer and pathfinder John C. Frémont.
Eastern cottonwood (Populus deltoides) is one of the largest North American hardwood trees, although the wood is rather soft. It is a riparian zone tree. It occurs throughout the eastern United States, parts of southern Canada, and northern Mexico.
A mature tree. Populus deltoides is a large tree growing to 20–30 m (65–100 ft) tall and with a trunk up to 2.8 m (9 ft 2 in) diameter, one of the largest North American hardwood trees. The bark is silvery-white, smooth or lightly fissured when young, becoming dark gray and deeply fissured on old trees. Bark of a mature tree
English names variously applied to different species include poplar (/ ˈ p ɒ p l ər /), aspen, and cottonwood. The western balsam poplar ( P. trichocarpa ) was the first tree to have its full DNA code determined by DNA sequencing , in 2006.
Candlenut tree (kukui) Aleurites moluccanus: 1959 [18] Idaho: Western white pine: Pinus monticola: 1935 [19] Illinois: White oak: Quercus alba: 1973 [20] Indiana: Tulip tree: Liriodendron tulipifera: 1931 [21] Iowa: Oak (variety unspecified) Quercus spp. 1961 [22] Kansas: Eastern cottonwood: Populus deltoides: 1937 [23] Kentucky: Tulip-tree ...