The Quadrangle Arboretum occupies seventy-four acres in northern Delaware County, Pennsylvania. Most of the property was assembled by J. Gates Lloyd II, beginning in 1931. Part of the estate came from the old Brookthorpe Farms, a portion of which had been in use as a nursery and had a fine collection of specimen trees including an impressive row of linden trees along Darby Road.

The Quadrangle campus is comprised of wooded forest, meadows, and developed areas liberally sprinkled with mature trees and younger specimens planted over the past thirty-five years. For ease of access, they restricted the arboretum to developed areas which are served by paved walks and access roads, making it easy for visitors to see the entire collection. In that area, they selected sixty-nine trees representing different species for their initial arboretum assembly. The predictable group of oaks, maples, and an array of conifers is accented by a magnificent American Sycamore, stately Lindens and Tulip Poplars and less common varieties like the Kentucky Coffee Tree and a Franklin Tree, our youngest specimen.

Quadranagle residents and visitors can view all these trees in a tranquil setting on a 1.5 mile walk. Weather in southeastern Pennsylvania is rarely extreme, making a winter walk through our arboretum almost as interesting as one taken in Spring or Summer.