The Index Herbariorum provides a global directory of herbaria (singular, herbarium; plural, herbaria) and their associated staff.
This searchable online index allows scientists rapid access to data related to 3,400 locations where a total of 350 million botanical specimens are permanently housed.
The Index Herbariorum has its own staff and website.
[1] The index was originally published by the International Association for Plant Taxonomy, which sponsored the first six editions (1952–1974); subsequently the New York Botanical Garden took over the responsibility for the index.
The Index provides the supporting institution's name (often a university, botanical garden, or not-for-profit organization), its city and state, and each herbarium's acronym, along with contact information for staff members and their research specialties, and the important holdings of each herbarium's collection.