Poplar is a type of tree that belongs to the genus Populus, which is part of the family Salicaceae. These trees are fast-growing and can reach heights of up to 100 feet or more. They have heart-shaped leaves and produce small greenish flowers in early spring before leaf expansion. The wood from poplar trees is often used for making furniture, plywood, and other products due to its strength and flexibility. In addition, the term "popular" has been derived from this tree's name as it was once widely planted throughout Europe and North America, hence gaining popularity among people.