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Jelly Rolls / Witch's Butter
2 species
Exidia is a genus of jelly fungi with gelatinous, often irregular, lobed or button-shaped fruit bodies that can merge into larger masses. Fries separated it from Tremella in 1822, and it was long placed with the Tremellales because of its basidia, but it is now classified in the Auriculariaceae (Auriculariales). Molecular work showed the genus as formerly circumscribed was artificial, and some species have been moved to Descidia and Ulocolla.
Fruit bodies are gelatinous and rubbery, firm when fresh, and can dry to a thin, dark crust. The spore-bearing surface is smooth or dotted with sterile pegs or pimples. The basidia are tremelloid: ellipsoid and longitudinally (vertically) septate. Spores are typically allantoid (sausage-shaped), less often oblong to cylindrical; spore print white.
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Mycology is an evolving science: names, classifications and safety information change as research advances. Entries are compiled from cited sources and reviewed, but may be incomplete or out of date — check the sources, and never rely on this library alone to identify or eat a mushroom.
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