Aspen poplar is a term used to describe a species of tree that is commonly found in North America. This tree is known for its white bark and fluttering leaves that turn brilliant yellow in autumn. Aspen poplar is also commonly called quaking aspen, trembling aspen, or simply aspen. These synonyms are used interchangeably to refer to the same tree, Populus tremuloides. However, in some regions, the term aspen may also refer to other related species, such as the bigtooth aspen or the European aspen. Regardless of the name used, the aspen poplar is a popular choice for landscapers and nature enthusiasts alike due to its beauty and versatility.