Suillus
Butter Boletus ( Suillus luteus )
The lubricating boletus ( Suillus ) are a genus of the family of Schmierröhrlingsverwandten.
The type species is the butter Boletus ( Suillus luteus ).
Features
The lubricating boletes are medium-sized, weichfleischige agarics whose hymenophore is formed as tubes. The hat skin is at least the age in most species greasy to slimy, but can also be felted. The dry, slimy in some species, may have a stalk of a velum partiale ring formed or glandular dots, the two features can also occur together. The stem is usually full. The tube layer may be yellow, olivaceous or pale orange colored, often there are distinct shades of gray, the size of the pores is variable.
Ecology
The lubricating boletes are mycorrhiza formers that are associated with conifers, yet they are often closely tied to a tree species. Some species such as the Douglas Boletus (p. lakei ) were deported with their host trees in areas where they originally did not occur.
Species
The genus includes about 50 species worldwide. In Europe, 35 taxa occur or are expected there.
Cow Röhrling Suillus bovinus
Cavus Boletus Suillus cavipes
Ring Loser butter mushroom Suillus collinitus
Grains Boletus Suillus granulatus
Gold Röhrling Suillus grevillei
Ivory Röhrling Suillus placidus
Rust Red Larch Boletus Suillus tridentinus
Sand Röhrling Suillus variegatus
Grey Larch Boletus Suillus viscidus
Importance
Some types of lubricating boletes are popular edible mushrooms.