A revision of the Inocybe lanuginosa group and allied species in North America

A morphological evaluation of the Inocybe lanuginosa group and allied speci es is presented for North American taxa. 425 collections from herbaria in N orth America and Europe representing putative taxa within the group have be en studied. 39 collections were subject to phenetic analysis using two clus tering procedures, UPGMA and Neighbor-Joining. Four species are recognized in the I. lanuginosa group: I. lanuginosa, I. leptophylla, I. teraturgus an d I. stellatospora. Taxonomy, illustrations and the North American distribu tion of these species are provided including two allied species, I. tahquam enonensis and I. diminuta. Inocybe stellatospora is an earlier name for I. longicystis. Inocybe nodulospora is an earlier name for I. ovatocystis, bot h of which are synonyms of I. lanuginosa. Inocybe lanuginosa var. alpina is synonymous with I. lanuginosa. Inocybe sabuletorum is not a synonym of any member of the I. lanuginosa group but rather a member of sect. Petiginosae . A key to nodulose-spored species of Inocybe with a scaly pileus and a sca ly to wooly-fibrillose stipe is included. We consider the name L lanuginosa to represent the synonymous species I. nodulospora and I. ovatocystis. We fix this interpretation by designation of an epitype for I. lanuginosa.