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.

Armillaria ostoyaeArmillaria ostoyae

conditionally edible

Armillaria ostoyaeArmillaria ostoyae

Photo: no rights reserved

Habitat

under spruce

under pines

mixed forests

Season

from September to November

Physalacriaceae

4–15 cm

Season

At its peakThe peak lasts until early November and the season usually until late November.

Today · 22–28 Oct97% of peak

how often reportedpeak

Season

Sep–Nov

Peak

Oct–Nov

Reports

173from Poland, few

Risk window

Sulphur Tuft grows at the same time

Both species grow together for about 11 wk a year. Most strongly from mid-October to late October.

Curve from 173 observations (iNaturalist, Poland), smoothed week by week. It shows when foragers most often report the species, not how much of it grows.

Key features

Cap brown to dark brown with distinctly darker, brown-black, dense scales; grows in clusters on coniferous wood. Stem with a thick, woolly, two-toned (white and brown) ring; requires cooking.

Similar (be careful)Confusions documented in our database

Sulphur TuftHypholoma fasciculare

toxic

The Honey Mushroom has a ring and dark scales on the cap; the Sulphur Tuft has no ring, has yellow-green colors and an extremely bitter taste.

BackCompare

Start

Scan

Atlas

Map

More