Yosemite National Park Herbarium is a significant regional collection dating from the early part of the 20th century to the present with the bulk of specimens dating from the 1920s to the 1960s. The bryophyte collection was acquired primarily between 2004-2012 for the "Yosemite Bryoflora Project" headed by Jim Shevock, assisted by collectors Alison Colwell and Martin Hutten. Most specimen identifications were made by Jim Shevock, David Toren, Bill Doyle, and Martin Hutten. This is an actively growing herbarium. The herbarium is a valuable component of the park's museum collections and is an essential tool for resource management: fire management, exotics programs, and vegetation management. It is also a valuable source of information to the scientific community about Yosemite's complex flora. Access to the collections is granted to researchers by advance appointment.