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  1. 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.

  2. Populus section Aigeiros is a section of three species in the genus Populus, the poplars. Like some other species in the genus Populus, they are commonly known as cottonwoods. The species are native to North America, Europe, and western Asia. In the past, as many as six species were recognized, but recent trends have been to accept just three ...

  3. 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.

  4. Populus trichocarpa, the black cottonwood, western balsam-poplar 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.

  5. Populus balsamifera ssp. trichocarpa is a large cottonwood tree of the western United States. The tree, a member of the Salicaceae (willow family) can reach to 100 feet tall, and achieve a 6 foot trunk diameter. The bark is rough and dark-colored, thus “black cottonwood”.

  6. Though necklace poplar (also known as eastern cottonwood) is a short-lived tree, already old at age 75, it can grow to 100 feet (30m) or more in height in its native streamside habitats. Cottonwood gets its common name from the wads of cotton surrounding its seeds, which facilitate dispersal by wind and water.

  7. Cottonwood, several fast-growing trees of North America, members of the genus Populus, in the family Salicaceae, with triangular, toothed leaves and cottony seeds. The dangling leaves clatter in the wind. Eastern cottonwood (P. deltoides), nearly 30 metres (100 feet) tall, has thick glossy leaves.

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