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Grzybiarz is a mobile app for mushroom foragers. Its on-device AI helps you spot fruiting bodies in the leaf litter and suggests a species from a photo, and the app keeps a private map of your finds. Everything runs on your phone and works fully offline in the forest without signal.

Bronze BoleteBoletus aereus

edible

Bronze BoleteBoletus aereus

Photo: (c) bogsuckers, some rights reserved (CC BY)

Habitat

deciduous forests

under oaks

beech forests

Season

from July to October

Boletaceae

7–30 cm

Season

Out of seasonOut of season. It usually grows from mid-July to early October.

Today · 22–28 Octout of season

how often reportedpeak

Season

Jul–Oct

Peak

Jul–Sep

Reports

112Poland and neighbours

Curve from 112 observations (GBIF: Poland, Czechia, Slovakia, Germany), smoothed week by week. It shows when foragers most often report the species, not how much of it grows.

Key features

Cap very dark, chocolate to blackish brown, matte, velvety, often with paler patches. Tubes white, then yellow-olive; stem stocky, brown, with a fine brown net in the upper half. Flesh white, firm, not changing color; a warmth-loving species, rarer in Poland, mainly under oaks in the south of the country.

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