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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.

Conifer-base PolyporeHeterobasidion annosum

inedible

Conifer-base PolyporeHeterobasidion annosum

Photo: (c) Andrejus Gaidamavičius, some rights reserved (CC BY)

Habitat

under pines

under spruce

Season

from January to December

Bondarzewiaceae

5–25 cm

Season

All yearGrows all year round. The curve only shows when people photograph it most.

Today · 29 Oct–4 Novout of season

how often reportedpeak

Season

Jan–Dec

Peak

Oct–Feb

Reports

445Poland and neighbours

Curve from 445 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

Irregular fruit body attached at the side, brown on top with a distinctly white margin, white with fine pores underneath. Grows low, at the base of trunks and on exposed roots of conifers. The main cause of rot in coniferous forests.

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