Phylum: Basidiomycota Class: Agaricomycetes
Order: Hymenochaetales Family: Hymenochaetaceae
Species: Mensularia radiata (Sowerby) Lázaro Ibiza
Synonyms: Boletus radiatus
Fomes radiatus
Fomes variegatus
Inonotus radiatus
Polyporus radiatus
Polystictus radiatus
Xanthoporia radiata
Ysgwydd y Gwern
Common Name: Alder Bracket


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This distribution map was produced using DMap
Mensularia radiataPhotographer: © David Mitchel
On Alder, Alnus glutinosa
Photographer: © David Mitchel

Photographer: © Mark Wright
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View this species in its UK context on the NBN Atlas
Associated Species (where recorded) & number of records:
Alnus glutinosa (82)
Alnus (11)
Salix cinerea (2)
Acer pseudoplatanus (2)
Alnus incana (1)
Betula (1)
Betula pubescens (1)
Pinus sylvestris (1)
Quercus robur (1)
Salix (1)
Habitat (where recorded) & number of records:
Woodland: broadleaved, semi-natural (15)
Woodland (13)
Parkland and scattered trees (7)
Woodland and scrub (7)
Woodland: broadleaved (7)
Neutral grassland: semi-improved (6)
Woodland: mixed (6)
Built up area, domestic (3)
Woodland: mixed, plantation (3)
Cultivated/disturbed land: amenity grassland (2)
Neutral grassland (2)
Scrub (2)
Woodland: coniferous, plantation (2)
Woodland: mixed, semi-natural (2)
Boundaries: defunct hedge (1)
Calcareous grassland: unimproved (1)
Coastland: intertidal, boulders/rocks, brown algal beds (1)
Cultivated/disturbed land: introduced shrub (1)
Grassland: marshy, lowland (1)
Grassland: marshy, upland (1)
Marsh/marshy grassland (1)
Parkland and scattered trees: broadleaved (1)
Parkland and scattered trees: mixed (1)
Scrub: dense/continuous, neutral (1)
Scrub: scattered, acidic (1)
Scrub: scattered, neutral (1)
Sump alderwoods (1)
Swamp (1)
Valley alderwoods on mineral soils (1)
Valley alderwoods on neutral-alkaline soils (1)
Wet valley alderwoods (1)
Woodland: broadleaved, plantation, high forest (1)
Woodland: mixed, plantation, high forest (1)
Substrate (where recorded) & number of records:
Tree (31)
Dead Wood (24)
Standing Dead Tree (15)
Wood (10)
Stump (4)
Fallen Tree (3)
Log (2)
Twig (2)
Cut Trunk (1)
Dead Branch (1)
Standing Dead Branch (1)
Tree, dead (1)
Tree, rotten (1)
Trunk, dead (1)
Trunk, fallen (1)
Months recorded in & number of records:
January (9)
February (5)
March (5)
April (12)
May (9)
June (7)
July (10)
August (6)
September (13)
October (36)
November (15)
December (3)