Paxillus involutus (Batsch) Fr.
(Brown Rollrim, Poison Pax, "The Silent Killer")

Taxonomic hierarchy:

Species	Paxillus involutus (Brown Rollrim, Poison Pax, "The Silent Killer")
Genus	Paxillus (mycorrhizal rollrims)
Family	PAXILLACEAE (a family of bolete toadstools)
Order	BOLETALES (spongecap toadstools and their relatives, boletes)
Subclass	AGARICOMYCETIDAE (a subclass of basidiomycetes)
Class	AGARICOMYCETES (a class of fungi)
Subphylum	AGARICOMYCOTINA (a subphylum of fungi)
Phylum	BASIDIOMYCOTA (spore droppers, basidiomycetes)
Kingdom	FUNGI (true fungi)
Domain	Eukaryota (eukaryotes)
Life	BIOTA (living things)

Paxillus involutus is also a member of:
Macromycetes - larger fungi, macrofungi (via Paxillaceae)
Ectomycorrhizal fungi - fungi that form ectomycorrhizae (via Paxillaceae)
Fungi s.l. - fungi (in the broad sense) (via Fungi)
Lower Plants - lower plants (via Fungi s.l.)

Identification Works

	Author	Year	Title	Source
	Henrici, A.	2005	Notes and Records (Oct 2004)	Field Mycology Vol 5 (4): 136-138.

Paxillus involutus (Brown Rollrim, Poison Pax, "The Silent Killer") may also be included in identification literature listed under the following higher taxa:

Paxillus
(mycorrhizal rollrims)

PAXILLACEAE
(a family of bolete toadstools)

BOLETALES
(spongecap toadstools and their relatives, boletes)

AGARICOMYCETIDAE
(a subclass of basidiomycetes)

AGARICOMYCETES
(a class of fungi)

BASIDIOMYCOTA
(spore droppers, basidiomycetes)

FUNGI
(true fungi)

Eukaryota
(eukaryotes)

BIOTA
(living things)

Macromycetes
(larger fungi, macrofungi)

Ectomycorrhizal fungi
(fungi that form ectomycorrhizae)

Fungi s.l.
(fungi (in the broad sense))

NBN (data.nbn.org.uk) has a distribution map for Paxillus involutus (Brown Rollrim, Poison Pax, "The Silent Killer")

BioInfo (www.bioinfo.org.uk) has 19 host/parasite/foodplant and/or other relationships for Paxillus involutus (Brown Rollrim, Poison Pax, "The Silent Killer")

The Brown Roll-rim is a very common toadstool throughout the British Isles. It is found in mixed and broad-leaved woodland, particularly with Betula and Quercus.

This website is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International Licence.

Unless otherwise expressly stated, all original material on the BioImages website by Malcolm Storey is licensed under the above Creative Commons Licence.

Photographs from other photographers are used with permission but not included under the above CC licence.

Taxonomic hierarchy:

Paxillus involutus is also a member of:

Identification Works

BioImages - Virtual Field-Guide (UK)