Species of edible fungus in the family Suillaceae native to Eurasia
Suillus luteus
Scientific classification
Domain:
Eukaryota
Kingdom:
Fungi
Division:
Basidiomycota
Class:
Agaricomycetes
Order:
Boletales
Family:
Suillaceae
Genus:
Suillus
Species:
S. luteus
Binomial name
Suillus luteus
(L.) Roussel (1796)
Synonyms[1]
Boletus luteus L. (1753)
Boletus volvatus Batsch (1783)
Cricunopus luteus (L.) P.Karst. (1881)
Viscipellis luteus (L.) Quél. (1886)
Ixocomus luteus (L.) Quél. (1888)
Boletopsis lutea (L.) Henn. (1898)
Species of fungus
Suillus
Mycological characteristics
Pores on hymenium
Cap is convex
Hymenium is adnate
or subdecurrent
Stipe has a ring
Spore print is brown
Ecology is mycorrhizal
Edibility is edible
Suillus luteus is a bolete fungus, and the type species of the genus Suillus. A common fungus native all across Eurasia from Ireland to Korea, it has been introduced widely elsewhere, including North and South America, southern Africa, 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 slimy in wet conditions. The fungus, initially described as Boletus luteus ("yellow mushroom") by Carl Linnaeus in 1753, is now classified in a different fungus family as well as genus. Suillus luteus (literally "yellow pig", from its greasy look in rain) is edible, though not as highly regarded as other bolete mushrooms. It is commonly prepared and eaten in soups, stews or fried dishes. The slime coating, however, may cause indigestion if not removed before eating. It is often sold as a dried mushroom.
The fungus grows in coniferous forests in its native range, and pine plantations in countries where it has become naturalized. It forms symbiotic ectomycorrhizal associations with living trees by enveloping the tree's underground roots with sheaths of fungal tissue. The fungus produces spore-bearing fruit bodies, often in large numbers, above ground in summer and autumn.
The fruit body cap often has a distinctive conical shape before flattening with age, reaching up to 13 cm (5 in) in diameter. Like other boletes, it has tubes extending downward from the underside of the cap, rather than gills; spores escape at maturity through the tube openings, or pores. The pore surface is yellow, and covered by a membranous partial veil when young. The pale stipe, or stem, measures up to 10 cm (4 in) tall and 3 cm (1.2 in) thick and bears small dots near the top. Unlike most other boletes, it bears a distinctive membranous ring that is tinged brown to violet on the underside.
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