M. cinnamomescens M. cirratulum M. crozalcii M. crystallinum M. evanidum M. frumentaceum M. fugacissimum M. grilletii M. hyalinum M. legonii M. mesomorphum M. minutissimum M. mirabilis M. podlachicum M. populinum M. rotundum M. simile M. varium Myxarium is a genus of fungi in the family Hyaloriaceae.

The genus was originally described by Karl Friedrich Wilhelm Wallroth in 1833 based on the visible white inclusions in the basidiocarps of the type species, Myxarium nucleatum, which he interpreted as spores[1] (they are in fact crystals of calcium oxalate).

The genus was synonymized with Exidia by subsequent authors, until revived by Dutch mycologist M.A.

[2] The revised concept of Myxarium emphasized the microscopic presence of septate basidia with enucleate stalk cells ("myxarioid" basidia), a feature absent in Exidia.

[3] Molecular research, based on cladistic analysis of DNA sequences, indicates that Myxarium is distinct from Exidia and forms a natural (monophyletic) group of species related to the type.