Type or presumed type collections of the type species ofMyxotrichumKunze (equiv;OncidiumT. F. L. Nees,ActinospiraCorda),CampsotrichwnEhrenb. Pers. andOncocladiumWallr. have been examined.Campsotrichum bicolorEhrenb. Pers. is congeneric withMyxotrichum chartarum(T. F. L. Nees) Kunze and asM. bicolor(Ehrenb. Pers.) Fries provides an earlier name forM. poluniniiApinis.Oncocladium flavumWallr. is based upon a conidial state ofActinodendron verticillatum(A. L. Smith) Orr and Kuehn, andTrickoderma vulpinumFuckel is a later synonym ofArachniotus lanatus(Wallr.) Apinis. A brief history of the namesCampsotrichum, Oncidium, Myxotrichum, andActinospirais given and the confusion in Fries's synonymy ofM. chartarumis partly explained.
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