Boletus aereus
The bronze bolete, Boletus aereus, is a warmth-loving broadleaf woodland cep, especially associated with oak and sweet chestnut. It is listed as Vulnerable in Switzerland in the 2007 Red List. Warm woodland may fit its ecology but never proves presence, and observations should be protected.
Warm, open, mature broadleaf woodland, especially with oak and sweet chestnut.
Summer into early autumn in warm areas. Listed as Vulnerable in Switzerland in the 2007 Red List.
A warmth-loving cep that needs protection in Switzerland
Boletus aereus lives in symbiosis with broadleaf trees and favours warm, mature, relatively open woodland. Oak and sweet chestnut are frequent partners, but their presence cannot predict fruiting.
The Swiss 2007 Red List classifies the species as Vulnerable and the national list treats it as a priority species. Observe without turning litter, avoid trampling and check current status and local rules before any collection.
Do not identify a cep from cap colour alone
The very dark or bronze-brown cap inspires the common name, but colour varies with age, moisture and light. Stem reticulation, pore colour, cut flesh, habitat and overall shape must be considered together.
Summer bolete, porcini and other boletes may appear similar. A map describes ecological potential and never replaces inspection of the complete specimen by an official expert.
Identification and lookalikes
Summer bolete, porcini, other members of the Boletus edulis group and bitter bolete may look similar. A dark cap is insufficient. Pores, stem reticulation, flesh, cut reaction and nearby trees must be assessed together.
The map helps you search. Never identify.
Cepello does not identify mushrooms and never confirms that a specimen is edible. Have your entire collection checked by an official inspection service.
Uncertainty or mild symptoms: Tox Info Suisse 145. Acute symptoms: 144.Read the safety guide →FAQ
Frequently asked questions
Is the bronze bolete rare in Switzerland?
It is listed as Vulnerable in the Swiss 2007 Red List and as a national priority species. Prefer observation, protect the soil and check current rules before any collection.
Which trees are associated with Boletus aereus?
Mainly warmth-loving broadleaf trees such as oak and sweet chestnut. A compatible tree never confirms the fungus.
Rain, soil, trees and season
Explore Switzerland
SwissFungi, WSL · VAPKO · Tox Info Suisse · OFEV et WSL, Liste rouge suisse 2007 · Catalogue of Life via GBIF, Boletus aereus · Photo CC0 de Boletus aereus via GBIF
Checked on 25.08.2026. An online profile can never confirm identity or edibility. Keep species separate and have everything intended for consumption inspected.