Tricholoma sulphureum - or sulfur goose, also called sulfur agaric, sulfur moth, is quite a popular mushroom found in autumn. The cap is sulfuric, sulfur-golden in color, it can sometimes be slightly scaly. It rarely exceeds 7 cm in diameter. In older fruiting bodies, a distinct olive green, olive yellow bump is visible. It may have discoloration visible in the photos in the form of brown circular spots.  

    The leg in yellow, olive-yellow, may be about 8 cm long. Mostly empty inside. The shape of the leg is even, the surface is fibrous.  

    Gills / Lamellae are thick, bright yellow, attached to the stem and positioned fairly well apart.  

  The flesh smells unpleasant and resembles carbide or sulfur. Sulfur-yellow, golden color does not discolor during mechanical damage.  

    Distribution - Sulfur Goose is widespread throughout Eurasia, from Europe to China and Japan in North America (both on the Atlantic and Pacific coasts, south to Florida and Mexico). Very common in Poland. It grows in various forests, mainly conifers, sometimes it can also be found under beech and oak trees. The fruiting bodies in the photos were found in a mixed beech and spruce forest in a sandy, alkaline area with a predominance of limestone rocks.  

    Application. Sulfur goose is inedible and can be confused with the edible green goose, which is admitted to trade in Poland. I advise against picking inexperienced mushroom pickers. Sulfur goose is poisonous because it contains substances that dissolve blood (haemolysins). Ingesting the mushroom is not fatal, but it can cause stomach discomfort. Although the fungus is poisonous, it is used in medicine. Research is ongoing on the phenolic acid contained in the fungus, which can be used to combat antibiotic-resistant staphylococci and streptococci.  

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Photo: Panasonic Lumix FZ82, 20 October 2020, Jura Krakow-Czestochowa, Poland
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