Penny bun

Boletus edulis

Also called: Porcini, Cep

In Spanish: Boleto, Hongo blanco, Hongo, Calabaza, Hongo calabaza, Seta de calabaza, Boleto comestible · In Catalan: Cep, Sureny, Siureny, Buixó · In Basque: Onddo zuri, Udazkeneko onddo zuri, Onddo buruzuri · In Galician: Madeirudo, Andoa, Boleto bo, Cogordo

Penny bun

Photo: ReddishClover / Wikimedia Commons · CC BY-SA 4.0

Penny bun

Photo: Tocekas / Wikimedia Commons · CC BY-SA 3.0

Penny bun

Photo: Tocekas / Wikimedia Commons · CC BY-SA 3.0

Penny bun

Photo: El Mono Español / Wikimedia Commons · CC BY-SA 4.0

Penny bun

Photo: Tomas Čekanavičius / Wikimedia Commons · CC BY-SA 3.0

Penny bun

Photo: Holger Krisp / Wikimedia Commons · CC BY 3.0

EdibleSeason Sep–NovSeason calendar →

The most prized of the boletes. Cap from pale ochre to chestnut, slightly greasy in damp weather; the tubes are white and turn yellow then green with age. Barrel-shaped stem with a fine pale net over its upper part. White flesh that does not blue when cut, mild and nutty — as good fresh as it is dried or frozen.

Quick facts

Scientific name
Boletus edulis Bull. (1782)
Family
Boletaceae
Edibility
Edible
Season
Sep–Nov
Usual altitude
304–1,645 m
Under which trees
Pine, Fir, Beech, Oak
Dangerous look-alike
Devil's bolete · Rubroboletus satanas
IUCN Red List
Least concern (LC)

How to recognise it

Cap
Pale ochre to chestnut, 8–30 cm, paler margin, greasy when damp
Gills, pores or pits
Pores white when young, then yellow and greenish; they do not stain when touched
Stem
Barrel-shaped and stout, whitish to pale brown, with a fine white net at the top
Flesh when cut
White and firm; does not blue or change colour when cut
Spore print
Olive-brown

Where it grows

Pine, fir, beech, oak and chestnut woods of northern Spain and the mountains of the Meseta, mostly on acid soil with moss and bilberry. The main flush comes after the autumn rains between 800 and 1600 m, in mycorrhiza with Scots, black and maritime pine, fir, beech, oak and chestnut.

Confused with

  • Devil's boleteRubroboletus satanasdangerous
    Cap
    Whitish or ash-grey, 8–25 cm, velvety and matt
    Gills, pores or pits
    Pores yellow or orange when young, soon red; they blue when pressed
    Stem
    Very swollen, yellow at the top and carmine red below, with a reddish net
    Flesh when cut
    Whitish and thick; blues only slowly and faintly when cut
    Spore print
    Olive-brown
    Where and when
    Oak and other broadleaf woods on limestone; summer to early autumn

    How to tell them apart: A red net on a red stem and pores that go from orange to red; the penny bun has a white net and white to greenish pores, never red.

    A whitish or ash-grey cap, pores yellow or orange in young specimens that soon turn red, and a reddish net over a swollen stem. The flesh blues only slowly and faintly when cut, so the cut will not rule it out: the red pores and the red net give it away. It causes severe gastric upset.

  • Bitter boleteTylopilus felleus
    Cap
    Pale brown to ochre, 5–15 cm, dry, slightly velvety
    Gills, pores or pits
    Pores white when young, turning pink as they mature; they bruise brownish
    Stem
    Stout, ochre to brown, with a coarse dark brown net
    Flesh when cut
    White, turning slightly pinkish; intensely bitter
    Spore print
    Pinkish brown
    Where and when
    Conifer and broadleaf woods, acid soil; summer and autumn

    How to tell them apart: Pores that turn pink and a coarse dark brown net; the penny bun has white to greenish pores and a fine white net.

    The tubes turn pink, the net on the stem is dark, and the flesh is unbearably bitter — it ruins the whole dish, but it does not poison.

When it has been found

Finds recorded in Spain, by month: 1,170 in all, from GBIF. They show when it fruits, and also when people go looking.

Jan: 5, Feb: 1, Mar: 0, Apr: 2, May: 5, Jun: 22, Jul: 36, Aug: 49, Sep: 219, Oct: 490, Nov: 237, Dec: 38

Where it has been found

Each square is an area of about 20 km with recorded finds; the darker, the more finds. It does not pinpoint patches: for where it is coming up now, see the forecast map.

Where it comes up

Areas where this species is scoring highest right now.

See it on the map

In guides and news

Sources

The usual altitude and the trees come from our own fit of the model to those finds and to the Spanish Forest Map (Mapa Forestal de España).

Would you know them from a photograph? →

The description is for reference. Identifying a mushroom from a photograph is unreliable: do not eat anything you are not sure of.