United States National Arboretum

The United States National Arboretum is an arboretum in Washington, D.C., operated by the United States Department of Agriculture's Agricultural Research Service as a division of the Henry A. Wallace Beltsville Agricultural Research Center. It was established in 1927, by an act of Congress after a campaign by USDA Chief Botanist Frederick Vernon Coville.It is 446acre in size and is located 2.2mi northeast of the Capitol building, with entrances on New York Avenue and R Street, Northeast. The campus's gardens and collections are connected by roadways that are nine miles long in total.The arboretum functions as a major center of botanical research. It conducts research on trees, flowering plants, shrubs and turf, as well as the development of plants. It has a library with 11,000 volumes and approximately 100 publications concentrating in botanical literature.Gardens/collectionsMajor garden featuresAquatic Plants CollectionAsian CollectionsJapanese WoodlandAsian ValleyChina ValleyKorean HillsideFlowering Tree CollectionFlowering Tree WalkArbor House Gift Shop operated by National Capital Area Garden Clubs, Inc.Friends of the National Arboretum OfficeNational Bonsai Foundation OfficeGotelli & Watnong CollectionsSpruces, Firs, Japanese MaplesNational Bonsai and Penjing Museum Japanese, Chinese, North American, and International Pavilions National Grove of State Trees, specimens of most of the U.S. state treesNational Herb GardenHistoric RosesKnot Garden Specialty Gardens Fern Vall