Hymenoscyphus fraxineus - Symptoms of <a href="https://en.wikipedia.org/wiki/Hymenoscyphus_fraxineus" class="extiw" title="en:Hymenoscyphus fraxineus">Chalara ash dieback</a>. A fungal disease affecting the ash trees of Europe. Picture shows how the wood within a branch turns a brownish-grey colour, which often extends longitudinally down the stem or branch. © Food and Environment Research Agency - OGL v1.0 - Wikimedia Commons
Forêt de la Massane - Frankenthal-Missheimle - Marais communal de Saint-Denis-du-Payré - Michel Brosselin - Pinail - Py - Ravin de Valbois