It is a common fungus indigenous to coniferous forests of Eurasia and North America, and introduced to southern Australia and New Zealand. Commonly referred to as slippery jack or sticky bun in English-speaking countries, its names refer to the brown cap, which is characteristically viscid in wet conditions. The fungus fruits abundantly in autumn, and is harvested for food. The slime coating, however, may cause indigestion if not removed.
Lactarius deliciosus, commonly known as the Saffron milk cap, Red pine mushroom, is one of the best known members of the large milk-cap genus Lactarius in the order Russulales. It is found in Europe and has been accidentally introduced to other countries under conifers and can be found growing in pine plantations. Michael Kuo, primary founder of the MushroomExpert website, cites Belgian mycologist Jorinde Nuytinck who determined that the mushroom is a "genetically, morphologically, and ecologically distinct European species that does not occur in North America".
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