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Illustration of small-leaved rose by Charles Faxon

Bradley Rosaceous Collection plants

Rosa ‘AUSblush’.
Pink english rose blossom


Fun Facts

  • The Prunus promenade, along the eastern end of the garden, is in peak bloom from late April to mid May.

  • Nantucket shadbush (Amelanchier nantucketensis) is one of many threatened plants grown by the Arboretum. Cream-colored flowers inconspicuously jewel the banks of Dawson Pond from May to early June.

  • Species and cultivar roses grace the beds and arbor of the rose roundabout. Sit on the Bradley Bench above the western end of the garden for a bird’s-eye view.

  • Sorbus yuana and Siberian crabapple (Malus baccata) are two of many outstanding specimens from the 1980 Sino-American Botanical Expedition growing in the garden.

  • The North American native swamp mallow(Hibiscus moscheutos ssp. palustris), around Dawson Pond feature large pink flowers between July and September.


This five acre (two hectare) garden showcases 893 plants representing 442 taxa (kinds), 335 species, 79 genera, and 34 families. Eighty-four percent of the plants in the garden are members of the rose family (Rosaceae). Taken together, the collections provide rich learning opportunities and seasonal interest.

In June 2011, the Arboretum installed and dedicated a new rose arbor in the Bradley Rosaceous Collection. The arbor honors Elizabeth Cabot Sluder, a longtime friend and supporter of the Arboretum and daughter of the collection’s benefactor and namesake, Eleanor Cabot Bradley. The installation of the arbor capped off a four-year renovation of the collection and its garden landscape, a collaboration between Arboretum staff and landscape designer Julie Moir Messervy. With a graceful design inspired by Messervy and developed by metal artist Peter Andruchow and his company WovenSteel, the arbor supports new accessions of Rosa ‘New Dawn’ and R. ‘Sombreuil’.



Featured Plants

Illustration of paperbark maple by Charles Faxon
12488*B Map it ↗

Paperbark Maple

Scientific Name
Acer griseum

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.

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Paperbark maple
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.

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Heptacodium at AA

Plants in this Collection

Plant ID Accession Date Recieved As Origin Source

Featured Walk

This quarter-mile tour through the Explorers Garden features stories from the Arboretum’s century and a half of collecting plants around the world. Click here to take this tour on Expeditions, the Arboretum’s mobile app.

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