Phylum: Basidiomycota Class: Agaricomycetes
Order: Agaricales Family: Omphalotaceae
Species: Rhodocollybia butyracea (Bull.) Lennox
Synonyms: Agaricus asemus
Agaricus bibulosus
Agaricus butyraceus
Agaricus butyraceus ? asemus
Agaricus leiopus
Collybia asema
Collybia bibulosa
Collybia bibulosum
Collybia butyracea
Collybia butyracea f. asema
Collybia butyracea f. butyracea
Collybia butyracea var. asema
Collybia butyracea var. bibulosa
Collybia butyracea var. butyracea
Rhodocollybia butyracea f. asema
Rhodocollybia butyracea f. butyracea
Common Name: Butter Cap

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Rhodocollybia butyraceaPhotographer:  Roy Anderson
Photographer: Roy Anderson

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:
Fagus sylvatica (38)
Larix (15)
Corylus avellana (13)
Quercus (8)
Picea (5)
Pinus (4)
Pseudotsuga menziesii (4)
Picea sitchensis (4)
Picea abies (4)
Pinus sylvestris (3)
Beech (3)
Quercus petraea (3)
Betula pendula (3)
Betula pubescens (2)
Larix decidua (2)
Salix (2)
Prunus laurocerasus (1)
Tsuga heterophylla (1)
Pinus contorta (1)
Crataegus monogyna (1)
Calluna vulgaris (1)
Betula (1)
Alnus glutinosa (1)
Acer pseudoplatanus (1)
Abies alba (1)
Hazel (1)
Habitat (where recorded) & number of records:
Woodland: mixed (27)
Woodland: coniferous, plantation (16)
Woodland: broadleaved, semi-natural (15)
Woodland: broadleaved (14)
Woodland: broadleaved, plantation (13)
Neutral grassland: semi-improved (9)
Woodland (9)
Woodland: mixed, plantation (8)
Parkland and scattered trees (7)
Woodland: mixed, semi-natural (5)
Acid grassland (4)
Built up area, domestic (4)
Acid grassland: semi-improved (3)
Woodland: coniferous (3)
Grassland and marsh (2)
Parkland and scattered trees: broadleaved (2)
Woodland: plantation (2)
Bare ground (1)
Boundaries: hedge with trees, species-rich (1)
Grassland: acidic, unimproved, lowland (1)
Grassland: improved/reseeded, lowland (1)
Marsh/marshy grassland (1)
Parkland and scattered trees: mixed (1)
Recently felled woodland (1)
Rowan-birch woods (1)
Scrub (1)
Scrub: dense/continuous, acidic (1)
Woodland and scrub (1)
Woodland: broadleaved, plantation, high forest (1)
Woodland: broadleaved, semi-natural, high forest (1)
Woodland: coniferous, semi-natural, high forest (1)
Woodland: mixed, plantation, coppice (1)
Substrate (where recorded) & number of records:
Soil Leaves (73)
Soil (58)
Soil Needle (26)
Soil Grassy (17)
Soil Mossy (5)
Leaf Litter (4)
Litter (4)
Larch (Larix) (1)
Needles (1)
Months recorded in & number of records:
January (5)
February (2)
March (2)
June (1)
July (5)
August (7)
September (25)
October (112)
November (89)
December (10)