page_title: United States National Arboretum
section_title: Single-genus groupings
hierarchical_section_title: United States National Arboretum / Gardens and collections / Single-genus groupings
caption_attribution_description: English: National Herb Garden at the United States National Arboretum in Washington The Arboretum is listed on the National Register of Historic Places.
context_page_description: The United States National Arboretum is an arboretum in northeast Washington, D.C., operated by the United States Department of Agriculture's Agricultural Research Service. It was established in 1927 by an act of Congress after a campaign by USDA Chief Botanist Frederick Vernon Coville.
  It is 446 acres in size and is located 2.2 miles northeast of the Capitol building, with entrances on New York Avenue, NE and R Street, NE. The campus' gardens, collections, and features are connected by roadways that are 9.5 miles long in total. In addition to the main campus in Washington, D.C., there are research locations at the Henry A. Wallace Beltsville Agricultural Research Center in Beltsville, Maryland and in McMinville, Tennessee.
  The Arboretum functions as a major center of botanical research conducted by the USDA, including applied research on trees, shrubs, turf, and the development of new ornamental plants. In addition to a library and a historical collection, the institution also has an extensive herbarium of over 800,000 specimens documenting wild and cultivated plant diversity.
context_section_description: Azalea Collections
  Glenn Dale Azalea Hillside, Morrison Garden, and Lee Garden
  Dogwood Collection
  Holly Collection
  Magnolia Collection
  National Maple Collection
  National Boxwood Collection
  Perennial Collections
  Source:
caption: National Herb Garden, U.S. National Arboretum
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