| Psathyrella rigidipes (Peck) A.H.Sm. | Miss Coffin | 24 Oct 1903 | United States of America | Massachusetts | Middlesex Co. | — |  |  |  |  | 
                       
                        
                            
                            
                                | Psathyrella rigidipes (Peck) A.H.Sm. | O. Hill | 11 Oct 1909 | United States of America | Massachusetts | Norfolk Co. Millis | — |  |  |  |  | 
                       
                        
                            
                            
                                | Psathyrella rigidipes (Peck) A.H.Sm. | E. A. Ellis | 13 Sep 1909 | United States of America | Massachusetts | Norfolk Co. Longwood | — |  |  |  |  | 
                       
                        
                            
                            
                                | Psathyrella rigidipes (Peck) A.H.Sm. | E. C. Ellis | 13 Sep 1909 | United States of America | Massachusetts | Norfolk Co. Brookline | — |  |  |  |  | 
                       
                        
                            
                            
                                | Psathyrella fuscofolia (Peck) A.H.Sm. | — | 16 Oct 1915 | United States of America | New York | Richmond Co. | — |  |  |  |  | 
                       
                        
                            
                            
                                | Psathyrella velutina (Pers. ex Fr.) Singer | — | Sep 1911 | United States of America | Virginia | White Post. | — |  |  |  |  | 
                       
                        
                            
                            
                                | Psathyrella velutina (Pers.) Singer | S. Lundell | 05 Oct 1933 | Sweden | Uppsala | Stadsparken | — |  |  |  |  | 
                       
                        
                            
                            
                                | Psathyrella velutina (Pers.) Singer | — | 12 Nov 1987 | Japan | Tottori | Otani, Daiei-cho, Tohaku-gun | — |  |  |  |  | 
                       
                        
                            
                            
                                | Psathyrella velutina (Pers.) Singer | R. K. Zebell | 03 Dec 1988 | United States of America | California | Mendocino Co. Russian Gulch State… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Psathyrella velutina (Pers.) Singer | H. E. Bigelow 16472 | 12 Aug 1971 | United States of America | Maine | Franklin Co. Hammond Pond | — |  |  |  |  | 
                       
                        
                            
                            
                                | Psathyrella velutina (Pers.) Singer | H. E. Bigelow 8411 | 12 Aug 1959 | United States of America | Massachusetts | Hampshire Co. Red Gate Lane | — |  |  |  |  | 
                       
                        
                            
                            
                                | Psathyrella velutina (Pers.) Singer | R. Demers | 15 Sep 1974 | United States of America | Massachusetts | Hampshire Co. Echo Hill | — |  |  |  |  | 
                       
                        
                            
                            
                                | Psathyrella velutina (Pers.) Singer | — | 01 Oct 1974 | United States of America | Massachusetts | Hampshire Co. | — |  |  |  |  | 
                       
                        
                            
                            
                                | Psathyrella velutina (Pers.) Singer | H. E. Bigelow 17069 | 23 Jun 1972 | United States of America | Massachusetts | Hampshire Co. Morrill Sci. Bldg. | — |  |  |  |  | 
                       
                        
                            
                            
                                | Psathyrella velutina (Pers.) Singer | H. E. Bigelow 19207 | 22 May 1986 | United States of America | Massachusetts | Hampshire Co. West side, Morrill… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Psathyrella velutina (Pers.) Singer | H. E. Bigelow 12366 | 20 Aug 1963 | United States of America | New Hampshire | Carroll Co. Off Kancamagus Hgwy,… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Psathyrella velutina (Pers.) Singer | S. Fultz HEB16068 | 02 Oct 1969 | United States of America | Massachusetts | Hampshire Co. | — |  |  |  |  | 
                       
                        
                            
                            
                                | Psathyrella velutina (Pers.) Singer | H. E. Bigelow 18309 | — | Denmark | — | Fanefjord Skov | — |  |  |  |  | 
                       
                        
                            
                            
                                | Psathyrella velutina (Pers.) Singer | H. E. Bigelow 15558 | 29 Sep 1968 | United States of America | Massachusetts | Franklin Co. Hamilton's Arboretum, near… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Psathyrella velutina (Pers.) Singer | H. E. Ahles HEB16188 | 25 Sep 1970 | United States of America | Massachusetts | Hampshire Co. U. Mass. Campus | — |  |  |  |  | 
                       
                        
                            
                            
                                | Psathyrella velutina (Pers.) Singer | H. E. Bigelow 14589 | 20 Sep 1965 | United States of America | Massachusetts | Hampshire Co. High Street | — |  |  |  |  | 
                       
                        
                            
                            
                                | Psathyrella velutina (Pers.) Singer | 5085 | — | Switzerland | — |  | — |  |  |  |  | 
                       
                        
                            
                            
                                | Psathyrella velutina (Pers.) Singer | L. K. Henry | 10 Nov 1949 | United States of America | Pennsylvania | Allegheny Co. Lawn of Warren… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Psathyrella velutina (Pers.) Singer | M. B. Knauz 11145 | 19 Sep 1936 | United States of America | Pennsylvania | Allegheny Co. "Little House" grounds,… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Psathyrella velutina (Pers.) Singer | L. K. Henry 4447 | 26 Sep 1940 | United States of America | Pennsylvania | Washington Co. Woods along Buffalo… | — |  |  |  |  |