This application searches Wikidata for natural history repositories (such as herbaria, museums, etc.) using the acronym for the institution (often referred to as the institutionCode). You can enter an institutionCode above, or try some of these examples:
Note that the results depend entirely on what is in Wikidata. For some background see Where is the damned collection? Wikidata, GrBio, and a global list of all natural history collections.