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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.

Macrolepiota mastoideaMacrolepiota mastoidea

edible

Macrolepiota mastoideaMacrolepiota mastoidea

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

Habitat

deciduous forests

mixed forests

parks, treelines

meadows, pastures

Season

from July to October

Agaricaceae

6–15 cm

Season

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

Today · 22–28 Oct94% of peak

how often reportedpeak

Season

Jul–Oct

Peak

Sep–Oct

Reports

434Poland and neighbours

Risk window

Death Cap grows at the same time

Both species grow together for about 7 wk a year. Most strongly from late September to late September.

Curve from 434 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

Smaller than the Parasol; cap whitish with a distinctly projecting, sharp, nipple-like umbo and fine light brown scales concentrated in the center. Stem slender with a fine brown pattern and a narrow ring; flesh white, not changing color.

Similar (be careful)Confusions documented in our database

DeathcapAmanita phalloides

deadly

Macrolepiota mastoidea has a distinct umbo in the center of the cap and fine scales; the Deathcap has a smooth, olive cap with fibrils and a volva. Always dig out the base of the stem to check for a volva.

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