Oreja de Judas (Auricularia auricula-judae)

Auricularia auricula-judae grows on the wood of deciduous trees and shrubs, particularly Sambucus nigra (elder).[17] It is also common on Acer pseudoplatanus (sycamore), Fagus sylvatica (beech), Fraxinus excelsior (ash), Euonymus europaeus (spindle), and in one particular case, the sycamore draining board of an old sink in Hatton Garden.[7] It very rarely grows on conifers.[19] It favours older branches, where it feeds as a saprotroph (on dead wood) or a weak parasite (on living wood),[7] and it causes a white rot.[20]