Find.

Identify.

Save.

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.

Sulphur KnightTricholoma sulphureum

harmful

Sulphur KnightTricholoma sulphureum

Photo: (c) Paco Bergson, some rights reserved (CC BY)

Habitat

deciduous forests

under oaks

beech forests

mixed forests

Season

from August to October

Tricholomataceae

3–9 cm

Season

EndingPast the peak. The season usually lasts until late October.

Today · 22–28 Oct94% of peak

how often reportedpeak

Season

Aug–Oct

Peak

Sep–Oct

Reports

1489Poland and neighbours

Curve from 1489 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

Entire fruit body intensely sulfur yellow; cap dry, smooth. Gills distant, thick, bright yellow; characteristic strong, unpleasant smell of coal gas (mercaptan-like), diagnostic.

BackCompare

Start

Scan

Atlas

Map

More