It’s fair to say that the epithet fraxinea is not indicative of the quite broad host range of this fungus. Granted, the same can be said about many other fungi, including Rigidoporus ulmarius and Pleurotus dryinus, and perhaps that’s one of the things we have to watch out for when it comes to identfying fungi on trees (and more broadly). Dealing specifically with Perenniporia fraxinea, which probably doesn’t have a common name, I want to share what other hosts I have come across that display signs of colonisation by this fungus (specifically, by identifying the fruiting bodies on the trunk and buttress area). This is, after all, an important aspect of tree management, and pin-pointing where fungi may occur outside of their suggestive range (by virtue of their epithet) is critical as a consequence. The mycological world loves to throw us curve-balls, and therefore we must be able to catch them when they are indeed thrown.
For the sake of ease, I have segmented the below pictures into headings detailing the different host species of Perenniporia fraxinea. I hope that some readers, either now or those who find this via a search engine in the future, find this of use – particularly those in the UK. However, before that, I shall list the host genera Ryvarden & Gilbertson list in their publication European Polypores (note this applies to all across Europe): Aesculus, Castanea, Celtis, Eucalyptus, Fagus, Fraxinus, Gymnocladus, Juglans, Olea, Malus, Platanus, Populus, Prunus, Robinia, Quercus, Salix, and Ulmus.
Acer pseudoplatanus (sycamore)
Aesculus hippocastanum (horse chestnut)
Fagus sylvatica (beech)
Populus spp. (poplar)
Quercus robur (English oak)
Robinia pseudoacacia (false acacia / black locust)