Phylum: Ascomycota Class: Leotiomycetes
Order: Helotiales Family: Helotiaceae
Species: Hymenoscyphus fraxineus (T. Kowalski) Baral, Queloz & Hosoya
Synonyms: Chalara fraxinea
Hymenoscyphus pseudoalbidus
Common Name: Ash Die back disease

Ubiquitous throughout Northern Ireland.
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This distribution map was produced using DMap
Hymenoscyphus fraxineusPhotographer:  David Mitchel
On Ash, Fraxinus excelsior
Photographer: David Mitchel

Photographer:  Roy Anderson
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View this species in its UK context on the NBN Atlas
Associated Species (where recorded) & number of records:
Fraxinus excelsior (6)
Habitat (where recorded) & number of records:
Woodland: mixed, semi-natural (4)
Woodland: broadleaved, semi-natural (1)
Substrate (where recorded) & number of records:
Rhachis (5)
Months recorded in & number of records:
July (4)
August (2)