Christensen, Morten & Jacob Heilmann-Clausen. Two new boreal species of Tricholoma from Fennoscandia. Mycotaxon 107: 431–440. 2009.
ABSTRACT: Two new species of Tricholoma are described from the boreal part of Fennoscandia. Tricholoma guldeniae is based on T. luridum sensu Nordic auct. Morphologically it belongs to the T. sejunctum group, but it is characterised by a greyish yellow cap, and large, irregular spores. Tricholoma olivaceotinctum is based on T. squarrulosum sensu Nordic auct. It is closely related to T. squarrulosum, but differs by growing with conifers and by having a distinct greenish-olive tint on the cap. Based on our present knowledge, these locally rather frequent species are endemic to North Europe (including Scotland). The identity of both species is supported by information from ITS sequencing. Descriptions, keys, and information on distribution and ecology of the new described species are given in the present paper.
KEYWORDS: Agaricales, boreal forest