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

  • Japanese Stewartia 1666-65*A
  • Rosebay Rhododendron 194-82*A
  • Purple Common Smoketree 708-49*C
  • Bottlebrush Buckeye 12652*A
  • Asiatic sweetleaf 17587-1*D
  • Swamp Locust 201-93*B
  • Plumleaf Azalea 815-90*J
  • Largeleaf Dogwood 1229-83*A
  • Armand Pine 472-54*A
  • Stewartia pseudocamellia 1666-65-A
    Japanese Stewartia 1666-65*A
  • Rhododendron maximum 194-82-A by Ned Friedman
    Rosebay Rhododendron 194-82*A
  • Cotinus coggygria 'purpureus' 708-49-C by Ned Friedman
    Purple Common Smoketree 708-49*C
  • Aesculus parviflora 12652-A by Ned Friedman
    Bottlebrush Buckeye 12652*A
  • Symplocos paniculata 17587-1-D Friedman
    Asiatic sweetleaf 17587-1*D
  • Gleditsia aquatica 201-93-B by Ned Friedman
    Swamp Locust 201-93*B
  • Rhododendron prunifolium 815-90-J by Ned Friedman
    Plumleaf Azalea 815-90*J
  • Cornus macrophylla 1229-83-A by Jon Hetman
    Largeleaf Dogwood 1229-83*A
  • Pinus armandii 472-54-A by Ned Friedman
    Armand Pine 472-54*A


Featured Event

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wonder spot: what's the buzz all about?, growth spurts, knobs, and knuckles: an environment of trees by lizi brown, expeditions : the arboretum’s new mobile app, watch with us!, the introduction of paperbark maple to the united states, virtual learning,

  • Wonder Spot: What's the buzz all about?

    Investigate pollinators in our vine and shrub garden. Bring a journal and your curiosity. #WonderSpots #GetOutside #OutdoorLearning

    Close-up of willows
  • Growth Spurts, Knobs, and Knuckles: An Environment of Trees by Lizi Brown

    Artist Lizi Brown details tree trunks in ink and paint, creating patterns in light and dark on paper panels.

    Photocollage of flowering trees
  • Expeditions : the Arboretum’s new mobile app

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

    Expeditions the app of the Arnold Arboretum
  • Watch With Us!

    Learn about plants and wildlife from Arboretum specialists.

    Silk moth
  • The Introduction of Paperbark Maple to the United States

    Read about the Arboretum's introduction and conservation of this rare and remarkable Chinese species on Google Arts & Culture.

    Peeling bark of Acer griseum
  • Virtual Learning

    30 minutes of nature learning can inspire a lifetime of nature noticing for children and their families.

    child drawn frog


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Today's Virtual Walks

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Plants & Collections

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Illustration of Kentucky Coffeetree fruit
324*B Map it ↗

Kentucky Coffeetree

Scientific Name
Gymnocladus dioicus

Nearly a century and a half old, this Kentucky coffeetree was one of the first plants grown from seed at the Arnold Arboretum. It was collected in Virginia by an amateur botanist named Allen Curtiss.


View plant bio
Ripening seedpods of Kentucky coffeetree.
Illustration of Heptacodium
1549-80*B Map it ↗

Seven Son Flower

Scientific Name
Heptacodium miconioides

A botanist at the Arnold Arboretum officially named and described the seven son flower in 1916. But the species would not be grown in the United States until 1980. This plant was among the first.

View plant bio
Heptacodium at AA

We are recordkeepers, researchers, volunteers, educators, artists, gardeners, librarians, and everyone in between.

  • Community Spotlight Devika Jaikumar, Curatorial Assistant
    Devika Jaikumar

    Everyone here is so passionate about plants and how we can share that passion with the world. The impact of green spaces on mental and physical health is invaluable, and it is an honor to be part of an institution that has been committed to that mission for so long.

  • Community Spotlight Ben Goulet-Scott, PhD Candidate
    Ben Goulet-Scott

    Working in the Arnold Arboretum means I am immersed in a living museum of biodiversity and inspired every day to pursue my research. Because the Arboretum offers such a popular public good to people both near and far, being based here means that I also have an incredible outlet to share my passion for biodiversity.

  • Community Spotlight Chris McArdle, Volunteer Tour Guide
    Chris McArdle leads a tour.

    Every tour brings a surprise, even after 36 years! It might be the sun catching the “Ruby Glow” witch hazel in February or the smell of toasted marshmallows from trodden katsura leaves in the fall. A squirrel running up a visitor’s trouser leg was perhaps the biggest surprise of them all.

  • Community Spotlight Nancy Sableski, Manager of Children's Education
    Nancy Sableski

    What’s not to love? The ever-changing landscape and the opportunity to learn new things every day from passionate and caring people are the two most extraordinary aspects of the Arboretum.

  • Community Spotlight Lawrence Mullings, Artist and Volunteer
    Lawrence Mullings

    This Place nourishes the Soul as well as the Body. I returned for my health and rediscovered such beauty openly observed and freely given by all who crossed my path. This Palace of the Senses allowed me to create The Path Taken. Maybe my Exhibit can serve as a remainder of days passed, soon to return.

  • Community Spotlight Rachel Lawlor, Arboretum Gardener
    Rachel Lawlor

    The community spirit at the Arboretum is truly palpable. From my first exposure as an Aggie intern in 2014, to being a full-time Gardener now, this has only grown. The folks who work here truly care about the Arboretum’s mission—and maybe even more so—about their colleagues.

  • Community Spotlight Larissa Glasser, Assistant Librarian
    Larissa Glasser

    Any walk or bike ride through the landscape is physically and spiritually restorative, all year round. I love teaching horticultural interns and students about our archives, Harvard’s shared online resources, and the importance of diversity and equal opportunities in STEM (Science, Technology, Engineering, Mathematics).

Student work by Sophie Geller, Dana Kash, Mary Miller