Parasitic Bolete - Pseudoboletus parasiticus

Alternative names
Xerocomus parasiticus

The cap is hemispherical and downy when young, later flat, yellowish brown or darker and up to 5 cm in diameter. The flesh is pale yellow with a mild taste and the spores are olive. The stem is pale yellow to olive. Pseudoboletus parasiticus is unlikely to be confused with any other species, because it occurs only with the Common Earthball, Scleroderma citrinum.

Similar Species

Whilst the bolete itself is not particularly distinctive, its growth from an Earthball is diagnostic.

Identification difficulty

Growing with Common Earthball - Scleroderma citrinum

When to see it

August to end of October.

Life History

It occurs only with the Common Earthball, Scleroderma citrinum and is thought to be parasitic on that species.

UK Status

Widespread, though infrequent, in the southern half of Britain. Quite scarce further north.

VC55 Status

Uncommon in Leicestershire and Rutland where there are only a handful of records.

Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map