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Exidia thuretiana is a species of jelly fungus in the family Auriculariaceae. It is characterized by its white, gelatinous, brain-like or convoluted fruiting bodies that grow on dead deciduous wood. When dry, it shrinks to a hard, horny crust, rehydrating to its original form when wet. It is a saprobic fungus, playing a role in the decomposition of wood.
How to Identify
- Cap
- Not applicable, as it is a resupinate or effused-reflexed jelly fungus without a distinct cap.
- Gills
- Not applicable, as it is a jelly fungus and does not produce gills.
- Stem
- Not applicable, as it is sessile and lacks a distinct stem.
- Flesh
- Translucent white, gelatinous, and rubbery. No distinct odor or taste.
- Fruiting body
- Irregularly lobed, convoluted, brain-like or cushion-shaped, often coalescing to form larger masses. Typically 1-5 cm across, but can be larger. Color is translucent white to grayish-white, becoming yellowish or brownish with age or when drying. Surface is smooth and somewhat shiny when moist, becoming dull and opaque when dry. Texture is gelatinous and rubbery when fresh, becoming hard and horny when dry, rehydrating readily.
- Habitat
- Saprobic, growing on dead deciduous wood, particularly on fallen branches and logs. Favors broadleaf trees such as oak, beech, and hazel. Often found on the underside or sides of logs.
Key Facts
- Cap surfaces: Not applicable (no cap)
- Growth Form: Effused, resupinate, or cushion-shaped, often coalescing
- Spore Print: White
- Body color: Translucent white to grayish-white
- Odor: Indistinct
- Flesh bruises: Does not bruise
- Height: Not applicable (sessile)
- Cap Diameter: 1-5 cm (individual lobes), often coalescing to larger masses
- Nutrient gathering: Saprobic
Safe
SafeExidia thuretiana is generally considered non-toxic, but it is not typically consumed due to its insubstantial and somewhat bland texture. There are no known toxins associated with this species. However, as with any wild mushroom, individual sensitivities can occur. It is not recommended for consumption.
Quick Check
- Odor: Indistinct
- Fruiting: Year-round, especially after rain or during wet periods.
- Substrate: Dead deciduous wood
Where to Find
North America
Widely distributed across temperate regions, particularly in eastern North America.
Europe
Common throughout Europe, especially in broadleaf woodlands.
Asia
Reported in parts of Asia, though less extensively documented than in Europe and North America.
Finding Tips
Look on dead wood
Focus your search on fallen branches, logs, and stumps of deciduous trees. It often grows on the bark or decorticated wood.
Check during wet weather
This fungus is most conspicuous and identifiable during periods of high humidity or after rain, when its gelatinous texture is fully hydrated. In dry conditions, it can shrink and become inconspicuous.
Examine undersides of logs
It frequently grows on the shaded, moist undersides or vertical sides of logs, where moisture is retained.
Similar Species
Witches' Butter
jelly fungus
Also known as: Yellow Brain Fungus
Crystal Brain Fungus
jelly fungus
Also known as: Tremella mesenterica (white forms)
White Jelly Roll
jelly fungus
Also known as: Phlebia tremellosa
Scientific Classification
- Phylum
- Basidiomycota
- Class
- Agaricomycetes
- Order
- Auriculariales
- Family
- Auriculariaceae
- Genus
- Exidia
Storage Information
- Max Temperature: Not applicable for culinary storage.
- Freezing duration: Not applicable for culinary storage.
- Min Temperature: Not applicable for culinary storage.
- Refrigeration: Not applicable for culinary storage.
How to Clean
Due to its gelatinous texture and typical growth on wood, it is generally not collected for culinary purposes. If for some reason it were to be used, a gentle rinse under cold water to remove debris would suffice. Avoid scrubbing, as it can damage the delicate texture.
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