Pruned quasi-median networks of species and species clusters of Hebeloma sect. Denudata. A H. alpinum complex B H. hiemale C H. aurantioumbrinum and H. helodes D H. cavipes and H. vaccinum. In networks, the size of the circles corresponds to the number of sequences they represent. Circles shared by two or more taxa are divided according to the number of representatives for each species. FE and RM refer to the origin of the collections, Europe or Rocky Mountains, respectively.