The Living Collections Policy (reviewed and approved in 2016) of the Arnold Arboretum guides the development, management, and enhancement of the institution’s Living Collections, and applies to all plants outlined below under Scope of the Living Collections. The Living Collections Policy is written by the Living Collections Advisory Board, which is chaired by the Curator of Living Collections and comprises the Director and Manager of Horticulture, as well as external members that are representative of the scientific and botanical garden communities. The Living Collections Policy is reviewed at least every five years and revised as needed.