Brown Roll-Rim
Paxillus involutus
Family: Paxillaceae
Also called: Brown Roll-Rim, Common Roll-Rim, Poison Pax
Overview
Was eaten across Northern and Eastern Europe for decades before being recognised as deadly — repeated exposure triggers a fatal autoimmune haemolytic anaemia. Brown cap with strongly inrolled margin, decurrent yellow-brown gills that bruise dark, stout stem. Birch, oak, and conifers. NEVER eat, regardless of preparation.
Edibility
Deadly poisonous
Rarity
common
Trophic mode
mycorrhizal
Typical peak
Sep–Oct
Season
Aug–Nov — typical fruiting months: Jul, Aug, Sep, Oct, Nov.
Host trees & substrate
- Mycorrhizal with birch
- Mycorrhizal with oak
- Mycorrhizal with conifer
Where it grows
See live fruiting predictions for Brown Roll-Rim on the forecast home page, or browse the full field guide.
Always confirm wild-mushroom identification with multiple sources and a knowledgeable local expert before consuming. Read the foraging safety guide.