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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.

Common puffballLycoperdon perlatum

edible

Common puffballLycoperdon perlatum

Photo: (c) Michael Nerrie, some rights reserved (CC BY)

Habitat

mixed forests

under pines

under spruce

deciduous forests

Season

from July to November

Agaricaceae

2–7 cm

Season

EndingPast the peak. The season usually lasts until early November.

Today · 22–28 Oct80% of peak

how often reportedpeak

Season

Jul–Nov

Peak

Sep–Oct

Reports

410from Poland

Risk window

Death Cap grows at the same time

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

Curve from 410 observations (iNaturalist, Poland), smoothed week by week. It shows when foragers most often report the species, not how much of it grows.

Key features

Fruit body pear-shaped or club-shaped, white to cream-brown, covered with small, conical warts that fall off with time (leaving a net-like pattern). Apex with an opening for releasing spores; flesh of young specimens white and firm; edible only when completely white inside; old ones greenish olive.

Similar (be careful)Confusions documented in our database

DeathcapAmanita phalloides

deadly

Young puffballs have UNIFORM white flesh inside; a young Amanita phalloides at the 'egg' stage shows the outline of the cap and gills when cut. ALWAYS cut every ball open before picking.

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