Genus
Populus (Poplars, cottonwoods, and aspens)
Populus trichocarpa. Photo: (c) Bryce McDavitt, some rights reserved (CC BY-NC)
Populus is a genus of 25–35 species of deciduous flowering plants in the family Salicaceae, native to most of the Northern Hemisphere. English names variously applied to different species include poplar /ˈpɒp.lər/, aspen, and cottonwood.