The U.S. Botanic Garden is under the jurisdiction of the Joint Committee of the
Library of Congress, but has been administered through the office of the Architect of the Capitol since 1934.
Today, the U.S. Botanic Garden maintains about 12,000 accessions, comprising more than 60,000 plants for exhibition, study, conservation, and exchange with other institutions. Important collections include economic plants, medicinal plants, orchids, carnivorous plants, cacti and succulents, mid-Atlantic native plants, and ferns. Many specimens date from the original founding collection from the U.S. Exploring Expedition (1838-1842).