Plant Collections

Plant Collections

Barnes Arboretum

Plant Collection Highlights

The 12-acre Arboretum contains more than 2,500 taxa (species/subspecies/cultivars/hybrids) of woody plants and perennials. Some are rare specimens, and all are beautiful. Discover a few of the highlights from the Barnes's living collections. Learn more

National Hosta Display Garden

A National Hosta Display Garden has been formed at the Barnes Arboretum as a mixed border, where the genus Hosta and its many cultivars can be enjoyed by arboretum visitors and students of the Barnes horticulture programs. Learn more

Medicinal Plants Garden

At the Barnes Arboretum in Merion, we have assembled a diverse teaching collection of more than 170 species and cultivars of medicinal plants to provide insight into their healing powers. Learn more

Laura L. Barnes Fern Dell

Laura L. Barnes, the late director of the Barnes Arboretum, was keenly interested in hardy ornamental ferns. In the late 1920s and the 1930s she planted almost 100 taxa of American and foreign ferns in the woods in the southeast corner of the Barnes Arboretum; many of these specimens survive to this day. Learn more


The Herbarium is the hidden gem of the Barnes Arboretum. With over 10,000 preserved plant specimens, it is a special resource for horticulturalists, students, and artists. Learn more

Tree Map

Click here for an interactive map of the trees in the Barnes Arboretum.

Pennsylvania State Champion Trees

Download a map of our state champion trees and learn more about them on the Barnes Blog.

Greater Philadelphia Gardens