Common name: brown witches butter.
Russian names: Eksidiya khryashchevaya, Eksidiya khryashchevataya.
Exidia cartilaginea is a species of fungus that belongs to the family Auriculariaceae. It is a gelatinous, ear-shaped fungus that grows on dead wood, particularly on deciduous trees. In St. Petersburg and Leningrad Oblast, it has been found in urban parks and forests, typically on birch, alder, and willow trees. In north-western Russia, it is widely distributed in temperate forests, often associated with moist environments and rich soil. The fungus fruits from summer to autumn, producing a cartilaginous, translucent to brownish-black fruiting body with a wavy or lobed margin.
Brown witches butter mushroom (jelly fungus, Exidia cartilaginea(?)) on a log in area of an old brick factory between Pesochnaya and Dibuny north-west from Saint Petersburg. Russia, March 26, 2017
Proletarskiy pr., 31, Pesochnyy, g. Sankt-Peterburg, Russia, 197758
Brown witches butter mushroom (jelly fungus, Exidia cartilaginea) on a dry willow near Chornaya River between Pesochnaya and Dibuny north-west from Saint Petersburg. Russia, April 3, 2017Proletarskiy pr., 31, Pesochnyy, g. Sankt-Peterburg, Russia, 197758
Brown witches butter (Exidia cartilaginea)(?) in area of Posiolok near Vyritsa, south from Saint Petersburg, Russia, May 1, 2017Unnamed Road, Vyritsa, Leningradskaya oblast', Russia, 188381Observations of Exidia cartilaginea in Leningrad Oblast and north-western Russia revealed its presence on various substrates. On March 26, 2017, the fungus was found on a log in an old brick factory area between Pesochnaya and Dibuny. A week later, on April 3, 2017, it was spotted on a dry willow near Chornaya River in the same region. Another sighting occurred on May 1, 2017, in the area of Posiolok near Vyritsa, south of Saint Petersburg. The fungus appeared to thrive in different environments, from logs to willows, and across various locations in the region. These observations suggest that Exidia cartilaginea is relatively common in Leningrad Oblast and north-western Russia, with a possible wide range of habitats. The sightings took place over a period of about a month, indicating the fungus's presence during spring.
Russian web-forums Planeta Gribov, V Kontakte, and Griby Sredney Polosy for learning names of local mushrooms.
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