The Algal Collection of the U.S. National Herbarium, part of the Smithsonian Institution's National Museum of Natural History, "is represented by over 219,548 accessioned and inventoried herbarium specimens preserved on herbarium sheets." The Collection includes estuarine, marine, freshwater, airborne, and terrestrial algae; however, macroscopic and marine comprise the principal holdings. In addition to information about the Collection, this website contains information regarding loan requests, scientific visits, and the Research Database. At present, only the Type Algal Collection can be searched online, but research inquiries of the main collection may be requested. Site visitors will also find information about staff members, algae collection and preservation, and marine floras in the Americas. Additionally, site visitors can view lists and selected abstracts of publications by Collection staff members.