Some Interesting Species of Tricholoma (Agaricales, Basidiomycota) Recorded for the First Time for the Bulgarian Mycobiota

The paper presents the first records in Bulgaria of some interesting or less-known species of the genus Tricholoma, namely Tricholoma arvernense, T. aurantium, T. boudieri, T. cingulatum, T. rapipes and T. viridilutescens. Of these, Tricholoma arvernense, T. rapipes and T. viridilutescens seem to be first reports from the Balkan Peninsula. Illustrations of the Bulgarian findings are included, along with data on their localities and ecology, and comments on the known distribution in the Balkan countries. The distinguishing features of the respective species from their closest allies are also briefly accounted.