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They are large, deciduous trees that are 15–30 m (50–100 ft) tall and diameters of 4 m (13 ft), [2] distinguished by thick, deeply fissured bark and triangular-based to diamond-shaped leaves that are green on both sides (without the whitish wax on the undersides) and without any obvious balsam scent in spring.
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 deltoides (eastern cottonwood) [132] Sometimes classified as a species, sometimes as the subspecies deltoides. A large tree with light wood that prefers damp silt or fine sand. It has the fastest growth rate among forest-inventory trees in North America. Uses: timber; pulpwood, veneers. [133] All
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.
Klehm Arboretum & Botanic Garden (155 acres (63 ha)) is a nonprofit arboretum and botanical garden located at 2715 South Main Street, Rockford, Illinois. The arboretum was established in 1910 as Rockford Nursery by landscape architect William Lincoln Taylor, who planted many of the arboretum's trees.