A foraging companion

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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.

Species atlas
Orange-latex MilkyLactarius deterrimus
edible
Orange-latex MilkyLactarius deterrimus
Photo: no rights reserved
Habitat
under spruce
mixed forests
Season
from August to November
Russulaceae
4–12 cm
Season
At its peakThe peak lasts until late October and the season usually until mid-November.
Today · 22–28 Oct89% of peak
how often reportedpeak
Season
Aug–Nov
Peak
Sep–Oct
Reports
1014Poland and neighbours
Curve from 1014 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
Very similar to the saffron milkcap found under pine, but the cap is paler, orange-pinkish, with weaker concentric zones. The orange milk turns green quickly (within minutes) on exposure to air: the key feature distinguishing it from L. deliciosus. Mycorrhizal only with spruce; flesh good to eat but of lower quality than the saffron milkcap.
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Grzybiarz
Grzybiarz is a foraging assistant; the decision to harvest is yours.
© 2026 GrzybiarzVersion 0.0.1 · f66d236
Mleczaj świerkowy (Lactarius deterrimus) — Edible · Grzybiarz