United States Botanic Garden
Featuring a beautiful and fascinating living plant museum located at the foot of the U.S. Capitol on the Nation's Mall.
www.usbg.gov
United States National Arboretum
United States National Arboretum
Conducts research, provides education, and conserves and displays trees, shrubs, flowers, and other plants to enhance the environment.
www.ars-grin.gov/ars/Beltsville/na
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