Background
The Arnold Arboretum’s living collections are celebrated as some of the most comprehensive and best documented of their kind. Its rich holdings include temperate ligneous plants from around the world. Many of the plants originate from collecting expeditions, others derive from horticultural experimentation, and some were existing vegetation when the Arboretum was founded in 1872. Each of these plants—some 16,000 in all—has a story to tell, and they are preserved as both scientific and horticultural specimens to enrich our understanding of biodiversity through the institution’s research, education, and outreach efforts.
Sections
Plant Bios
‘Arnold Promise’ Witch-hazel
This winter-blooming showstopper was born at the Arboretum almost a century ago.
Paperbark Maple
A remarkable and rare species native to central China, this maple is most known for its striking copper-colored papery bark. Plant collector Ernest Henry Wilson introduced it to North America in 1907. The Arboretum is home to some of the oldest paperbark maples outside of China.
Collections
Today’s Walks
Our self-guided walks are a great way to learn more about our trees and plants from home or as you stroll through the landscape. Forge a deeper connection with the Arnold Arboretum’s collections as well as the plants you encounter in your daily life. Explore further with the Expeditions mobile app to hear stories about botany, horticulture, conservation, and Arboretum history through photos, text, and audio segments.

Director’s Tour

Keeper’s Tour

A Walk Through Time, Part 1

A Walk Through Time, Part 2
Expeditions Unveiled
A NACPEC Expedition in North America
Exploring the botanical diversity of Appalachia with international collaborators
