Inocybe woglindeana, a new species of the genus Inocybe, thriving in exposed habitats with calcareous sandy soil

We describe a smooth-spored species of Inocybe, the basidiomes of which have been encountered growing with Salix in exposed habitats, often with calcareous sandy soils in Germany and Fennoscandia. The species is presented with a detailed description, photographs and microdrawings. Its relationship to similar taxa growing in the same environments is illustrated with ITS and LSU data. Morphologically the species would be keyed out as a member of I. sect. Tardae. For comparison, the types of somewhat similar species occurring in similar habitats as I. woglindeana, i.e. I. subpelargonium, I. rufuloides, I. inodora, I. neorufula and I. variispora, were examined morphologically; from the latter ITS and mtSSU V6 data were obtained. Molecular data supported a very close relationship between I. woglindeana and I. variispora. The two species are also morphologically similar, but differ in colour of pileus, in shape and details of hymenial cystidia, and also in their host and habitat. None of the other species, represented by our own collections or sequences from the public domain, are phylogenetically closely related to I. woglindeana.