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


Ubiquitous throughout Northern Ireland.
Click on the dots to get a species list for the 10km square that it represents.
This distribution map was produced using DMap
Hymenoscyphus fraxineusPhotographer: © David Mitchel
On Ash, Fraxinus excelsior
Photographer: © David Mitchel

Photographer: © Roy Anderson
Have you a photograph, digital or otherwise that you would like to provide for this page? Or would you like to use this photograph? If so, please e-mail David Mitchel at the address given on the home page.

Or search Google Images for this species
View this species in its UK context on the NBN Atlas
Associated Species (where recorded) & number of records:
Fraxinus excelsior (12)
Corylus avellana (1)
Habitat (where recorded) & number of records:
Woodland: mixed, semi-natural (6)
Woodland: broadleaved, plantation (2)
Woodland: mixed, plantation (2)
Woodland and scrub (1)
Woodland: broadleaved, semi-natural (1)
Substrate (where recorded) & number of records:
Rhachis (7)
Leaf (3)
Nut (1)
Twig (1)
Months recorded in & number of records:
June (1)
July (7)
August (6)
September (1)