Jew's Ear

Imagine the scene - the Last Supper, just after JC stood up and told the disciples, "OK, the bill is 240 Dinarii, that's 20 Dinarrii each - Oi! Judas, where are you off to?"

The alder, upon which this fungii may be found, is my favourite little lecture spot for friends and family. 

Etymology

Auricula is a Latin word meaning ear. Judae means Judas, the Jew who it is said betrayed Jesus. Older field guides may list this species under the common name Jew's Ear fungus, a derogatory term that I will mention only once in case you see it either online or in an earlier printed publication and wonder which species it refers to. Other, older common names for this species include Wood Ear and Judas' Ear - the latter a reference to the belief that Judas Iscariot hanged himself on an Elder tree in shame after betraying Jesus Christ to his executioners. The legend, which dates back more than 400 years, suggests that the fulgal 'ears' that emerge from Elder wood are visible residues of Judas' tormented spirit.

Carl Linnaeus.
I believe that Auricula is the only fungus with three names within the binomial naming system, created by Carl Linnaeus.