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The Arnold Arboretum of Harvard University is a museum of trees teaching the world about plants.

  • Medlar 274-2018*A
  • Bottlebrush Buckeye 12652*A
  • Konara Oak 763-81*B
  • Chinese Catalpa 98-61*B
  • Culitvar of Bell's Honeysuckle 1337-84*A
  • Silk Tree 1442-77*B
  • Japanese Black Pine 1767-77*B
  • Golden Rain Tree 427-87*A
  • Japanese Clethra 241-96*A
  • Chinese Torreya 1087-89*A
  • X Crataemespilus canescens 274-2018-A
    Medlar 274-2018*A
  • Aesculus parviflora 12652-A by Ned Friedman
    Bottlebrush Buckeye 12652*A
  • Quercus glandulifera 763-81-A by Ned Friedman
    Konara Oak 763-81*B
  • Catalpa ovata 98-61-B by Ned Friedman
    Chinese Catalpa 98-61*B
  • Culitvar of Bell's Honeysuckle 1337-84*A
  • Albizia julibrissin 1442-77-B by Ned Friedman
    Silk Tree 1442-77*B
  • Pinus thunbergii 1767-77-A by Ned Friedman
    Japanese Black Pine 1767-77*B
  • Koelreuteria paniculata 14928-1-B by Ned Friedman
    Golden Rain Tree 427-87*A
  • Japanese Clethra 241-96*A
  • Torreya grandis var. merrillii 1087-89-A
    Chinese Torreya 1087-89*A

Featured Event

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What’s New

entrance improvement project, expeditions : the arboretum’s mobile app, 2023 annual report, equity, the roslindale gateway path project,

  • Entrance Improvement Project

    We are partnering with Michael Van Valkenburgh Associates to study and renew six historical entrances to our landscape.

    Street-view concept for possible improvements to the Arborway Gate entrance includes bollards to exclude traffic, planting beds that extend the Arboretum’s character to the street, and creating a space outside the entrance for the public to meet and embark
  • Expeditions : The Arboretum’s Mobile App

    Explore stories about botany, horticulture, conservation, and Arboretum history through photos, text, and audio segments.

    Expeditions the app of the Arnold Arboretum
  • 2023 Annual Report

    Read about the plants, people, and projects that made 2023 a banner year at the Arnold Arboretum.

    2023 annual report cover
  • Equity

    Founded on a set of democratic ideals, the Arnold Arboretum inspires as an enduring landscape dedicated to public access. We are continually reassessing and refining our efforts to make the Arboretum more welcoming to all. It’s a work in progress.

    Visitors at Dawson Pond by Bruce Wilson.
  • The Roslindale Gateway Path Project

    Improving carbon-free transportation and green space equity in Boston.

    Map of Arnold Arboretum and neighborhood


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Today's Virtual Walks

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Plants & Collections

See more Plants & Collections
Line drawing of feathery silk tree foliage
13381*A Map it ↗

‘Ernest Wilson’ Silk Tree

Scientific Name
Albizia julibrissin ‘Ernest Wilson’

The ‘Ernest Wilson’ silk tree exemplifies the often-unpredictable successes, and complications, of global plant collecting.

View plant bio
Pink and white silk tree flower against green foliage
Stewartia pseudocamelia illustration
11440*A Map it ↗

Japanese Stewartia

Scientific Name
Stewartia pseudocamellia

This Japanese stewartia—and its nearby sibling—was collected in Korea in 1917. Its taxonomic status has inspired the curiosity of generations of botanists. 

View plant bio
Fallen flowers of Japanese stewartia

We are fellows, gardeners, horticulturists, educators, researchers, and everyone in between.

  • Community Spotlight Camilo Villouta, Putnam Fellow
    Man stands next to tree holding pruners

    There are not many other places where I could study such a diverse group of species. I love having such an exceptional collection next door to the lab, and despite spending so much time in the landscape, I still keep finding wonderful new spots with plants from around the world.

  • Community Spotlight Emily Hitchcock, Greenhouse Gardener
    Woman in greenhouse planting small seedlings

    I am so grateful to come to work every day in a place where so many people come to find joy, relaxation, healing, and learning. Working with seeds and plants in the beginning stages of their lives is a constant reminder of the miraculous and complex life cycles that plants carry out all around us.

  • Community Spotlight Jeffrey Scott Phillips, Assistant Manager of Horticulture
    Horticulturist smiles standing in front of pond

    The Arnold has an incredible history of plant-loving people that I really relate to. I feel lucky to work here and look forward to it every day.

  • Community Spotlight Sarah Nechamen, Manager of Adult Programming and Events
    Sarah Nechamen portrait

    I love creating programs that get people excited about plants and the Arboretum and seeing the participants’ reactions first-hand. When someone feels really inspired, or excited, or awestruck because of a program I planned, there’s no better feeling.

  • Community Spotlight Daniel Faccini, PhD Candidate

    I think the Arboretum's most valuable impact is its role as a place where people can engage in a relationship with plants, something usually forgotten in big cities. The collection of hundreds of fascinating plant species offers each day a new flower, a bark you have not seen before, or a giant tree that has seen generations of visitors walking by.

Student work by Sophie Geller, Dana Kash, Mary Miller