Agarics of alders 1 – the Alnicola badia complex

Three closely related species in <i>Alnicola</i> sect. <i>Alnicola</i>, <i>Alnicola</i>, are described,\nillustrated, and compared. <i>Alnicola badia</i> is revised based on the type collection and recent\ncollections made under <i>Alnus alnobetula</i>. Two species (<i>A. longicystis</i>, <i>A. xanthophylla</i>)\nassociated with <i>Alnus glutinosa</i> and <i>A. incana</i> and locally frequent in western and central\nEurope are described as new.