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Suillus granulatus, commonly known as the Oiler Bolete or Slippery Jack, is a bolete mushroom characterized by its slimy cap and granular stem. It is an edible mushroom, but some individuals may experience gastrointestinal upset. It is often found in association with pine trees.
How to Identify
- Cap
- The cap is typically convex, smooth, and slimy to the touch, especially when wet. The color ranges from yellowish-brown to orange-brown. The cap surface is often sticky or glutinous.
- Gills
- Instead of gills, Suillus granulatus has pores on the underside of the cap. These pores are small, angular, and yellowish, becoming more brownish with age. They are easily separable from the cap flesh.
- Stem
- The stem is cylindrical, yellowish, and covered with granules or glandular dots, especially towards the apex. It lacks a ring or annulus.
- Flesh
- The flesh is soft and yellowish. It may have a slightly acidic or indistinct odor and taste.
- Fruiting body
- The fruiting body of Suillus granulatus is a mushroom with a distinct cap and stem structure, typical of boletes.
- Habitat
- Suillus granulatus is commonly found in coniferous forests, particularly under pine trees. It forms mycorrhizal associations with the roots of these trees.
Key Facts
- Cap surfaces: Slimy, smooth
- Growth Form: Solitary or in small groups
- Spore Print: Yellowish-brown
- Body color: Yellowish-brown to orange-brown
- Odor: Mild, slightly acidic or indistinct
- Flesh bruises: Does not typically bruise
- Height: 4-10 cm
- Cap Diameter: 5-12 cm
- Nutrient gathering: Mycorrhizal
Safe
Mild ToxicitySuillus granulatus is generally considered edible, but some individuals may experience gastrointestinal upset, especially if the mushroom is not cooked thoroughly or if the slimy cap is not removed. It is not known to contain any potent toxins.
Quick Check
- Odor: Mild, slightly acidic or indistinct
- Fruiting: Late summer to autumn
- Substrate: Soil, associated with pine trees
Where to Find
Coniferous Forests
Found in coniferous forests, especially under pine trees.
Europe
Common throughout Europe.
Finding Tips
Look Under Pines
Search for this mushroom near pine trees, as it forms a symbiotic relationship with them.
Check After Rain
The cap is especially slimy after rain, making it easier to identify.
Similar Species
Suillus luteus
a bolete mushroom
Also known as: Sticky Bun or Slippery Jack
Scientific Classification
- Phylum
- Basidiomycota
- Class
- Agaricomycetes
- Order
- Boletales
- Family
- Suillaceae
- Genus
- Suillus
Storage Information
- Max Temperature: 20
- Freezing duration: 3 months
- Min Temperature: 2
- Refrigeration: 2-3 days
How to Clean
To clean Suillus granulatus, remove any debris or pine needles from the cap and stem. The slimy cap can be peeled if desired. Wipe gently with a damp cloth.
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