Phylum: Basidiomycota	Class: Agaricomycetes
Order: Auriculariales	Family: Auriculariaceae
Species: Exidia glandulosa (Bull.) Fr.

Synonyms:

Exidia intumescens Exidia plana Exidia spiculosa Exidia truncata Gyraria spiculosa Tremella arborea Tremella atra Tremella glandulosa Tremella intumescens Tremella spiculosa Ymenyn y Wrach

Common Name:

Witches' Butter

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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: Quercus (20) Quercus petraea (20) Quercus robur (6) Fagus sylvatica (3) Corylus avellana (2) Tilia (2) Acer pseudoplatanus (1) Salix (1) Quercus ilex (1)

Habitat (where recorded) & number of records: Parkland and scattered trees (7) Woodland and scrub (5) Woodland: broadleaved, plantation, high forest (4) Woodland: broadleaved, semi-natural (4) Woodland: mixed, plantation, high forest (4) Parkland and scattered trees: mixed (3) Woodland: mixed, plantation (3) Parkland and scattered trees: broadleaved (2) Woodland (2) Woodland: broadleaved (2) Woodland: mixed, semi-natural (2) Cultivated/disturbed land: introduced shrub (1) Fraxinus excelsior-Sorbus aucuparia-Mercurialis perennis woo (1) Lowland hazel-sessile oakwoods (1) Quercus petraea-Betula pubescens-Oxalis acetosella woodland (1) Woodland: mixed (1)

Substrate (where recorded) & number of records: Branch (15) Wood (13) Dead Wood (9) Dead Branch (7) Fallen Branch (4) Fallen Tree (3) Tree (3) Log (2) Standing Dead Branch (2) Rotting Wood (1) Soil (1) Trunk, dead, fallen (1)

Months recorded in & number of records: January (4) February (4) March (10) April (6) May (9) June (1) July (2) August (9) September (6) October (23) November (4) December (4)