''Suillus placidus'', is a species of fungus in the genus ''

Suillus ''Suillus'' is a genus of basidiomycete fungi in the family Suillaceae and order Boletales. Species in the genus are associated with trees in the pine family (Pinaceae), and are mostly distributed in temperate locations in the Northern Hemispher ...

''. It is an edible

pored mushroom The Boletaceae are a family of mushroom-forming fungi, primarily characterised by small pores on the spore-bearing hymenial surface (at the underside of the mushroom), instead of gills as are found in most agarics. Nearly as widely distrib ...

found in European and North American coniferous forests, growing in association with several species of

pine A pine is any conifer tree or shrub in the genus ''Pinus'' () of the family (biology), family Pinaceae. ''Pinus'' is the sole genus in the subfamily Pinoideae. The World Flora Online created by the Royal Botanic Gardens, Kew and Missouri Botanic ...

of the subgenus ''Strobus''.

Description

The

cap A cap is a flat headgear, usually with a visor. Caps have crowns that fit very close to the head. They made their first appearance as early as 3200 BC. Caps typically have a visor, or no brim at all. They are popular in casual and informal se ...

of ''Suillus placidus'' is hemispherical when young, later becoming convex. It is ivory white in colour and very slimy, growing to 10 cm in diameter. The

stem Stem or STEM may refer to: Plant structures * Plant stem, a plant's aboveground axis, made of vascular tissue, off which leaves and flowers hang * Stipe (botany), a stalk to support some other structure * Stipe (mycology), the stem of a mushr ...

is slender, ringless and ivory white with grey granular dots or blotches near the top. The soft

flesh Flesh is any aggregation of soft tissues of an organism. Various multicellular organisms have soft tissues that may be called "flesh". In mammals, including humans, ''flesh'' encompasses muscles, fats and other loose connective tissues, but ...

is yellowish white with a mild taste. The

spore In biology, a spore is a unit of sexual or asexual reproduction that may be adapted for dispersal and for survival, often for extended periods of time, in unfavourable conditions. Spores form part of the life cycles of many plants, algae, ...

s are ochre.

Ecology

''Suillus placidus'' is found in Asia, Europe and North America occurring exclusively alongside species of five-needled

of the subgenus ''Strobus''. The

ectomycorrhizal An ectomycorrhiza (from Greek ἐκτός ', "outside", μύκης ', "fungus", and ῥίζα ', "root"; pl. ectomycorrhizas or ectomycorrhizae, abbreviated EcM) is a form of symbiotic relationship that occurs between a fungal symbiont, or mycob ...

association is beneficial for both fungus and tree, and is a form of symbiosis. In Asia, it is known to occur in the

Russian Far East The Russian Far East (russian: Дальний Восток России, r=Dal'niy Vostok Rossii, p=ˈdalʲnʲɪj vɐˈstok rɐˈsʲiɪ) is a region in Northeast Asia. It is the easternmost part of Russia and the Asian continent; and is admin ...

with

Siberian pine ''Pinus sibirica'', or Siberian pine, in the family Pinaceae is a species of pine tree that occurs in Siberia from 58°E in the Ural Mountains east to 126°E in the Stanovoy Range in southern Sakha Republic, and from Igarka at 68°N in the lowe ...

(''Pinus sibirica''),

Siberian dwarf pine ''Pinus pumila'', commonly known as the Siberian dwarf pine, dwarf Siberian pine, dwarf stone pine, Japanese stone pine, or creeping pine, is a tree in the family Pinaceae native to northeastern Asia and the Japanese isles. It shares the commo ...

(''P. pumila'') and

Korean pine ''Pinus koraiensis'' is a species of pine known commonly as the Korean pine. It is native to eastern Asia: Korea, northeastern China, Mongolia, the temperate rainforests of the Russian Far East, and central Japan. In the north of its range, ...

(''P. koraiensis''). It has also been reported in China. It is rarely seen in Europe, where it is known to form ectomycorrhizal associations with

Swiss pine ''Pinus cembra'', also known as Swiss pine, Swiss stone pine or Arolla pine or Austrian stone pine or just stone pine, is a species of a pine tree in the subgenus ''Strobus''. Description The Swiss pine is a member of the white pine grou ...

(''Pinus cembra'') and introduced

eastern white pine ''Pinus strobus'', commonly called the eastern white pine, northern white pine, white pine, Weymouth pine (British), and soft pine is a large pine native to eastern North America. It occurs from Newfoundland (island), Newfoundland, Canada west ...

(''P. strobus''). In north-eastern North America, its range coincides with that of the native eastern white pine (''P. strobus''). The fungus fruits in summer and autumn with fruiting bodies occurring singly or in small groups.

Description

Ecology

Edibility

See also

References

External links