 Cornelis Bas (1990), however, did not consider the group distinct, placing the hygrophoroid genera within the Tricholomataceae, a disposition followed by the next (2001) edition of the "Dictionary of the Fungi".In contrast, Marcel Bon (1990) believed the Hygrophoraceae were so distinct, he placed the family in its own separate order, the Hygrophorales.Recent molecular research, based on cladistic analysis of DNA sequences, suggests the Hygrophoraceae are distinct from the Tricholomataceae and are monophyletic (and hence a natural grouping).