Phylum: Basidiomycota Class: Agaricomycetes
Order: Boletales Family: Paxillaceae
Species: Paxillus involutus (Batsch) Pers.
Synonyms: Agaricus adscendibus
Agaricus contiguus
Agaricus involutus
Omphalia involuta
Paxillus involutus var. excentricus
Paxillus involutus var. subinvolutus
Common Name: Brown Rollrim

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Paxillus involutusPhotographer:  David Mitchel
Photographer: David Mitchel

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View this species in its UK context on the BMS Database
Associated Species (where recorded) & number of records:
Betula (49)
Betula pendula (48)
Betula pubescens (22)
Fagus sylvatica (20)
Corylus avellana (8)
Beech (6)
Picea abies (5)
Larix decidua (3)
Abies procera (3)
Betula jacquemontii (2)
Pinus sylvestris (2)
Quercus (2)
Larix (2)
Castanea sativa (1)
Abies (1)
Fraxinus excelsior (1)
Alnus glutinosa (1)
Picea sitchensis (1)
Pinus radiata (1)
Quercus petraea (1)
Habitat (where recorded) & number of records:
Woodland: broadleaved, semi-natural (29)
Woodland: mixed (16)
Woodland: broadleaved (9)
Woodland (7)
Built-up areas (5)
Parkland and scattered trees (5)
Neutral grassland: semi-improved (4)
Parkland and scattered trees: mixed (4)
Woodland: broadleaved, plantation (4)
Woodland: coniferous, plantation (4)
Woodland: mixed, plantation (4)
Acid grassland (3)
Built up area, domestic (3)
Mire: blanket bog (3)
Bog (2)
Boundaries: hedge with trees, species-rich (2)
Woodland: mixed, semi-natural (2)
Woodland: plantation (2)
Acid grassland: semi-improved (1)
Acid grassland: unimproved (1)
Boundaries: hedge with trees (1)
Calcareous grassland: semi-improved (1)
Marginal/inundation: marginal (1)
Neutral grassland: unimproved (1)
Parkland and scattered trees: broadleaved (1)
Scrub (1)
Woodland: coniferous (1)
Substrate (where recorded) & number of records:
Soil (60)
Soil Leaves (32)
Soil Grassy (29)
Soil Mossy (25)
Larch (Larix) (8)
Soil Needle (8)
Soil Peat (3)
Dead Wood (1)
Grass (1)
Tree (1)
Months recorded in & number of records:
January (1)
March (4)
May (1)
June (1)
July (9)
August (35)
September (79)
October (74)
November (17)