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 436 taxa (kinds), 331 species, 78 genera, and 33 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’.
- Find directions and accessibility information for this collection
- Learn more about roses from the American Rose Society.
- Visit the Eleanor Cabot Bradley Estate, the residence of the late Eleanor Cabot Bradley; benefactor of the Bradley Rosaceous Collection.
- Read about the construction of this Rosaceous Collection
Plants in this Collection
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This quarter-mile tour through the Explorers Garden features stories from the Arboretum’s century and a half of collecting plants around the world. If you’re at the Arboretum, click here to take a version of this tour with Expeditions, our mobile web app.