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Suillus luteus

 
Suillus luteus, commonly known as Slippery jack, is a most widespread summer and autumn fungus. This edible bolete is most often seen in large numbers beside paths in pine woods.

Identification guide

Cap

When wet, the caps of this species are slimy; in hot sunny weather they dry to a smooth semi-matt finish.

Usually dark chestnut brown, but occasionally quite a lot lighter, the caps of Suillus luteus grow to between 5 and 10 cm in diameter.

Tubes and pores

Beneath the cap, a white veil covers the lemon yellow pores of this bolete. The veil tears to leave an irregular ring on the stem and often pieces of veil hanging from the cap margin.

At first lemon yellow, the medium-sized round pores darken to a sienna-yellow with age.

Stipe

2 to 3 cm in diameter and 5 to 10 cm tall, the stipe is pale straw-yellow at first, darkening with a dot pattern above the ring and  an irregular covering of brown longitudinal fibres near the base.

Spore print

Ochraceous or buff coloured.

Odour/taste

Not distinctive.

Habitat

Beneath conifers in damp, usually shaded places.

Season

August to November.

Occurrence

Frequent.

Similar species

  1. Suillus grevillei has a bright yellow-orange cap and angular pores; it occurs under larch.
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