Phylum: Basidiomycota Family: Boletaceae
Leccinum albostipitatum den Bakker & Noordel
Widely known as Leccinum aurantiacum, the type species is thought to be a different taxon entirely. This current species with the white flocculose stipe and orange cap (discolouring with age) has been re-descibed under this new name. Associated with Populus species
References:
Kibby (2011) - British Boletes with keys to species