Coltricia confluens: a new polypore from the Netherlands

Recently, a fungus has been reported from young, planted parks (e.g. Keizer, 1985) which shows some resemblance to Coltricia perennis (L.: Fr.) Murrill, but which differs from that species in several respects: 1) growth habit; 2) zonation of the pileus; 3) colours; 4) shape of the pileus; 5) ecology. As this fungus is already known from several places in the Netherlands and invariably seems to differ from any species described in the literature it is described here as a new species.