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
Velvet-footed TapTapinella atrotomentosa
inedible
Velvet-footed TapTapinella atrotomentosa
Photo: (c) Elizabeth Axley, some rights reserved (CC BY)
Habitat
under pines
under spruce
Season
from July to October
Tapinellaceae
5–25 cm
Season
Out of seasonOut of season. It usually grows from mid-July to mid-October.
Today · 22–28 Octout of season
how often reportedpeak
Season
Jul–Oct
Peak
Aug–Sep
Reports
291from Poland
Risk window
Brown Roll-Rim grows at the same timeBoth species grow together for about 11 wk a year. Most strongly from early September to early September.
Curve from 291 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 large, fleshy, brown-ochre, felty, with an inrolled margin. Characteristic stem: short, off-center, covered with a thick, dark brown to black velvety coating; gills cream, crowded, decurrent, browning. Grows only on stumps of conifers.
Similar (be careful)Confusions documented in our database
Brown Roll-RimPaxillus involutus
deadly
The Velvet-footed Tap has a dark velvety stem and grows on conifer stumps; it is inedible. The Brown Roll-Rim grows in soil under trees and is TOXIC (hemolytic anemia). Discard both.
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Grzybiarz
Grzybiarz is a foraging assistant; the decision to harvest is yours.
© 2026 GrzybiarzVersion 0.0.1 · f66d236
Krowiak aksamitnotrzonowy (Tapinella atrotomentosa) — Inedible · Grzybiarz