A detailed description of the polypore Oxyporus obducens (Pers.) Donk is given on the basis of a study of fresh specimens as well as herbarium material from several European countries. Great variability of the distinguishing characters has been stressed. Upon comparison of several specimens of the North American Oxyporus similis (Bres.) Ryv., the author concluded that this species is identical with the European fungus, and therefore its name should be put in the synonymy of Oxyporus obducens (Pers.) Donk.
Vampola P. (1993): Oxyporus obducens, a polypore displaying variability. – Česká Mykologie 46(3-4): 228–233.
