In 1911,
landscape architect John Nolen proposed an arboretum for Madison based on
Boston's
Arnold Arboretum. In 1922
Michael Olbrich and the Madison Parks Foundation began working to acquire land on the southwest shore of Lake Wingra. The UW Arboretum was founded on April 26, 1932, when the University Board of Regents accepted from the Parks Foundation the deeds to 6 parcels totalling 246 acres of land, creating the "University of Wisconsin Forest Preserve Arboretum and Wildlife Refuge". The acreage at the time was mostly farmland fields and pastures. In 1932,
G. William Longenecker was hired by the Board of Regents to work with the Arboretum and be on the Arboretum Committee, which was formed by Ed Gilbert. In 1933, Longenecker was named Arboretum Executive Director, and he served in this capacity until he retired in 1967. Longenecker Horticultural Gardens would be named after him in 1967, and a stone bench placed, honoring his 34 years of service as the Arboretum's Executive Director. He was also the first Head of the University of Wisconsin Landscape Architecture Department.
Aldo Leopold was named Research Director of the Arboretum in 1933 and also was the first professor of game management in the U.S. He was also the first chair of the Department of Game Management at the University of Wisconsin. Leopold and other members of the first Arboretum Committee, especially Professor
Norman C. Fassett of the Botany Department, proposed a research agenda around re-establishing "original Wisconsin" landscape and plant communities, particularly those that predated European settlement, such as
tallgrass prairie and
oak savanna. Between 1935 and 1941, crews from the
Civilian Conservation Corps provided most of the labor to accomplish this task under the supervision of Ted Sperry, an ecologist and prairie plant root specialist who had studied with Arthur G. Vestal at the University of Illinois. Such work would eventually become known as
ecological restoration. Some of the first
tall-grass prairie restorations in the United States took place at the Arboretum. In 2020, Curtis Pond was rehabilitated, and an invasive prairie plant was removed. In addition to its long-standing commitment to
ecological restoration, the Arboretum also features traditional horticultural collections of labeled plants arranged in garden-like displays. Today the Arboretum manages the oldest restored tall grass prairie in the nation along with an extensive collection of restored ecosystems that are referred to as "ecological communities": woodlands, savannas, prairies, wetlands, springs, and the Lake Wingra shoreline. In 1994, Ed Hasselkus became the volunteer curator for the Longenecker Horticultural Gardens. In 2022, Ed and Betty Hasselkus endowed the curator position for the Longenecker Horticultural Gardens. In July, the curator position was named the Ed Hasselkus curator of the Longenecker Horticultural Gardens == Prairies and savannas ==