Woldmaria
Woldmaria is a fungal genus in the family Niaceae. The genus is monotypic, containing the single species Woldmaria filicina, found in Europe and North America. Woldmaria was described by William [Bridge Cooke] in 1961, with Woldmaria crocea as the type species; it was subsequently moved into synonymy with W. filicina. It is a species linked only to the fern Matteuccia struthiopteris, having basidiomes constituted by numerous brownish tubules growing at the base of the host plant.