Brown Roll Rim

Poisonous Poisonous
Autumn Autumn
Summer Summer

This common and deadly poisonous mushroom is thankfully easy to identify.

Mushroom Type
Common Names Brown Roll Rim, Poison Pax, Common Roll Rim
Scientific Name Paxillus involutus
Season Start Aug
Season End Nov
Average Mushroom height (CM) 8
Average Cap width (CM) 20
Please note that each and every mushroom you come across may vary in appearance to these photos.


Flattened with a slight depression towards the middle with the edges always rolling under to the gills. Rusty brown with a slimy cap when wet.


Gills very pale yellow/brown bruising darker. Crowded and running down the stem.


Pale brown, smooth and darkening on bruising.


Pale brown yellow darkening on cutting.


Broad leaved woodland, particularly birch and  on heathland and grassland including lawns.

Possible Confusion

A distinctive mushroom with some variability. After recent DNA studies mycologists have now divided this mushroom in a group of species, but beside looking quite similar for foraging purposes all Roll Rim species (Paxillus sp.) should be treated as poisonous.
The Velvet Roll Rim (Tapinella atrotomentosa) is similar but grows on wood and it’s also not considered safe for consumption.

At a first glance it could sometimes resemble one of the  Milkcaps (Lactarius) but unlike those it doesn’t exude any milk from the gills.

Spore Print

Burnt brown. Ellipsoid.

Taste / Smell

Do not taste any part of this mushroom.


Very common.

Other Facts

This mushroom contains a toxin that can be neutralised by lengthy boiling and discarding the water several times but this does not remove another toxin that can build up in the body over time and eventually lead to a rather nasty death. It is eaten in certain parts of Eastern Europe but still leads to deaths every year there. Definitely a mushroom to avoid.

Despite having gills this mushroom is closer related to Boletes (mushrooms with pores) than other gilled mushrooms.


1 comment for Brown Roll Rim

  1. Michelle says:

    Brown Roll Rim

    While cutting the grass I discovered lots of these under the birch tree. I’ve removed all I spotted. We have two dogs and one of them has been very interested in this area. I know it’s deadly to humans but can’t see anything on dogs. Worried he may have eaten some before I spotted them!
    Many thanks

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