The Arnold Arboretum of Harvard University is a museum of trees teaching the world about plants.
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Eastern Red Cedar 109-2006*B
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Caspian Honeylocust 272-72*B
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Purple Beautyberry 501-90*B
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Cultivar of Bloodtwig Dogwood 394-2007*C
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Tibetan Barberry 360-92*G
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<em>Euonymus hamiltonianus</em> 14576-2*A
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<em>Isodon henryi</em> 593-2010*A
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<em>Liquidambar acalycina</em> 1634-80*A
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Cultivar of London Planetree 1984-65*A
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Eastern Hemlock 144-2011*A
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Eastern Red Cedar 109-2006*B -
Caspian Honeylocust 272-72*B -
Purple Beautyberry 501-90*B -
Cultivar of Bloodtwig Dogwood 394-2007*C -
Tibetan Barberry 360-92*G -
<em>Euonymus hamiltonianus</em> 14576-2*A -
<em>Isodon henryi</em> 593-2010*A -
<em>Liquidambar acalycina</em> 1634-80*A -
Cultivar of London Planetree 1984-65*A -
Eastern Hemlock 144-2011*A
Featured Event
Basic Botany
Join Nicole Forsyth, horticulturist and plant science educator, for a primer on all things botany: different plant parts and what they do, the movement of water and nutrients around the plant, gas exchange, plant reproduction and more. No prior botany knowledge needed! Whether you're looking for a botany refresher or learning plant form and function for the first time, this class will give you the basics you need to know.
What’s New
Support Your Arboretum
Your Generosity Nurtures Discovery
In 2025, gifts and memberships made it possible to keep this living landscape vibrant—both in person and online—while advancing research, education, and conservation. Contribute to the annual fund to help the Arboretum advance its mission amid headwinds in science and higher education.
Legacies in the Landscape
Celebrating Hu Xiansu
Hu Xiansu (H. H. Hu), a pioneering botanist who laid the foundation for modern plant taxonomy in China, earned his doctorate at Harvard 100 years ago. His groundbreaking identification of the “living fossil” dawn redwood and leadership in creating China’s botanical institutions cemented his legacy as one of the most influential figures in 20th-century botany.
Your Landscape for Learning
Winter Programs
View our winter 2025-26 program catalog and register for practical classes, creative workshops, theme tours, wildlife explorations, and wellness programs at the Arboretum.
Advancing Science and Careers
Apply for 2026 Research Opportunities
Applications are now being accepted for the Katharine H. Putnam Fellowship in Plant Science, the Global Change Postdoctoral Fellowship, Arnold Arboretum Research Awards, and the 2026 research internship for undergraduates.
Summer Horticultural Internships
Hunnewell Internship Program
Applications are being accepted for paid internships in collections management with concentrations in horticulture and landscape maintenance, arboriculture, plant production, or collections curation. Experiences combine hands-on training, interactive educational classes and networking opportunities.
An Entrance Revitalized
Washington Street Gate Renewal
With completion of donor-funded renovations to the Washington Street entrance nearing, the gate into Bussey Brook Meadow and Blackwell Footpath have reopened to visitors and green transit commuters. Additional landscape work at Washington Street will continue this fall.
Stories
Today’s Virtual Walks
Director’s Tour
Introductory Tour
A Walk Through Time, Part 1
Explorers Garden Tour
Plants & Collections
Japanese Black Pine
Like a giant bonsai, this Japanese black pine's trunk curls and twists.
Ulleungdo Hemlock
In 2003, a researcher collected a sample from this hemlock. Genetic analysis revealed something unusual. This tree proved to be a new species, previously unknown to science.
See more Plants & Collections →
