Entoloma trichomarginatum, a new species of subgenus Leptonia (Entolomataceae) from Spain

Entoloma trichomarginatum sp. no is described from Catalonia (Spain). It belongs to subgenus Leptonia and is characterized by the deep blue to almost blue-black tomentose pileus, bluish lamellae sides, and the sterile lamellar edge composed of almost 350 mu m long cheilocystidia filled with blue intracellular pigment. A comparison with other close taxa is given, as well as photographs and drawings of the macroscopical and microscopical characters.