The collection of fungi refers mainly to sporocarps or other reproductive structures. Mycelial samples are only preserved for specimens of myxomycetes or parasitic fungi.
Samples are preserved dry, placed in paper envelopes within cardboard boxes. The entire collection still requires systematization and digitalization. The fungal collection is preserved inside the herbarium’s installations under controlled conditions of temperature and humidity, to avoid pests and guarantee its conservation
The collection comprises an estimated number of 3,000 samples. It includes specimens collected by important mycologists such as Romualdo González Fragoso (1862-1928), a pioneer mycologist in the Iberian Peninsula, or Pius Font i Quer. The majority of the collection comes from herbarium exchanges with other European institutions like Finnish exsiccatae Mycotheca Fennica (1934-1953) from Johan Ivar Liro.
Other fungi specimens are separately kept inside the cryptogam section of the historical collections of the Salvador family, Bernades, Ramon de Bolòs, Vayreda and Trèmols.
The Botanical Institute of Barcelona (IBB) also houses the collection of the Associació Micològica Font i Quer, which mainly includes specimens from Catalonia.