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Slippery Jack

Edible Edible
Autumn Autumn
Summer Summer

This slimy topped mushroom is common to Pine plantations and can usually be found close to paths in late Summer and Autumn. One of the few Bolete species to have a skirt.

Mushroom Type
Common Names Slippery Jack
Scientific Name Boletus / Suillus luteus
Season Start Aug
Season End Sep
Average Mushroom height (CM) 10
Average Cap width (CM) 8
Please note that each and every mushroom you come across may vary in appearance to these photos.

Cap

Dark brown to purple/brown with a very glutinous cap when wet, more rusty brown when dry. Starting convex and broadly flattening with age.

Pores

The pores are round, tightly packed and lemon yellow to dull yellow. When young they are covered by a veil which will break free from the cap forming the skirt.

Cortina / Veil

The veil completely covers the pores on young mushrooms.

Stem

Off white to yellow, more yellow above the skirt and covered in small brown granular spots.

Skirt

Thick and white underneath, brown above from the dropping spores, on older mushrooms the underside can become pale lavender coloured or the whole ring can become just a mark on the stem.

Flesh

White, sometimes with a red/purple flush towards the base. Unchanging when exposed to air.

Habitat

With Pine, especially in Pine plantations.

Possible Confusion

The Larch Bolete can look similar but is more orange/yellow, the Larch Bolete variant, Suillus grevillei var. badius is darker capped but also has a darker stem not the off white stem of Slippery Jack.

Spore Print

Brown. Subfusiform. The image is of the upper surface of the skirt where it has caught some dropping spores.

Frequency

Common with pine.

Other Facts

It has been reported that the slimy skin on the cap can cause adverse reactions in some people so is best removed before cooking.

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