major botanical research centre famous for its collection of ornamental trees and shrubs from Asia. Founded in 1872, the arboretum consists of 265 acres (107 hectares) at Jamaica Plain in Boston, and it has another 106-acre (43-hectare) installation at Weston, Massachusetts, U.S. The Arnold Arboretum has acquired and cultivated more than 6,000 types of woody plants during its history; by the late 1990s nearly 5,000 were being cultivated. Of special importance are its Oriental cherries, forsythias, lilacs, honeysuckles, oaks, magnolias, conifers, dwarf evergreens, and Asiatic trees. The arboretum maintains an herbarium comprising more than 1.3 million reference specimens, principally from southern and eastern Asia and New Guinea. It also publishes the Arnoldia, a quarterly magazine.