Phylum: Basidiomycota	Class: Agaricomycetes
Order: Boletales	Family: Paxillaceae
Species: Paxillus involutus (Batsch) Fr.

Synonyms:

Agaricus adscendibus Agaricus contiguus Agaricus involutus Brown Roll Rim Cantel Mewndro Brown oir chruinn dhonn oirean cruinne donna Omphalia involuta Paxillus involutus var. excentricus Paxillus involutus var. subinvolutus

Common Name:

Brown Rollrim

An ectomycorrhizal species

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This distribution map was produced using DMap

Photographer: © David Mitchel

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View this species in its UK context on the NBN Atlas

Associated Species (where recorded) & number of records: Betula (75) Betula pendula (50) Fagus sylvatica (27) Betula pubescens (24) Corylus avellana (8) Picea abies (5) Larix (4) Quercus (4) Fraxinus excelsior (3) Abies procera (3) Larix decidua (3) Picea (2) Pinus sylvestris (2) Betula jacquemontii (2) Castanea sativa (1) Carpinus betulus (1) Tilia (1) Abies (1) Alnus glutinosa (1) Picea sitchensis (1) Pinus (1) Pinus radiata (1) Quercus petraea (1)

Habitat (where recorded) & number of records: Woodland: broadleaved, semi-natural (35) Woodland and scrub (16) Woodland: mixed (16) Woodland (13) Woodland: broadleaved (9) Built-up areas (7) Parkland and scattered trees: mixed (7) Parkland and scattered trees (6) Woodland: coniferous, plantation (5) Neutral grassland: semi-improved (4) Woodland: broadleaved, plantation (4) Woodland: mixed, plantation (4) Woodland: mixed, semi-natural (4) Acid grassland (3) Bog: raised (3) Built up area, domestic (3) Mire: blanket bog (3) Bog (2) Woodland: plantation (2) Acid grassland: semi-improved (1) Acid grassland: unimproved (1) Boundaries: hedge with trees (1) Boundaries: hedge with trees, species-rich (1) Calcareous grassland: semi-improved (1) Marginal/inundation: marginal (1) Neutral grassland: unimproved (1) Parkland and scattered trees: broadleaved (1) Scrub (1) Wet dwarf shrub heath (1) Woodland: coniferous (1)

Substrate (where recorded) & number of records: Soil (92) Soil Leaves (32) Soil Grassy (30) Soil Mossy (29) Soil Needle (8) Soil Peat (3) Dead Wood (1) Grass (1) Leaf Litter (1) Soil bare (1) Tree (1)

Months recorded in & number of records: January (10) March (4) May (1) June (2) July (10) August (67) September (109) October (92) November (18)