Mycological herbaria function as repositories for fungal specimens.  In addition to constituting objects of study, herbarium specimens can serve to validate scientific studies  or in the construction of  catalogues of species regarding local, regional, or national fungal floras.  Herbaria also act as repositories of genetic information.  Based on the Fungal Herbarium of Tel Aviv University, which has 4,022 specimens, a collection that was developed by Prof. Nissan Binyamini over the last 40 years, we are currently in the process of a critical revision of the two main Orders of Higher Fungi: Agaricales and Aphyllophorales, adding new records from all around the country. The database of these two Orders classifies them into groups according to the ecological role they play in nature.