| Hydnellum aurantiacum (Batsch:Fr.) P.Karst. | E. D. Hansing 63 | 10 Oct 1937 | United States of America | New York | Tompkins Co. Coy Glen | — |  |  |  |  | 
                       
                        
                            
                            
                                | Hydnellum aurantiacum (Batsch:Fr.) P.Karst. | L. O. Overholts | 28 Jul 1942 | United States of America | Pennsylvania | Centre Co. Treaster Kettle | — |  |  |  |  | 
                       
                        
                            
                            
                                | Hydnellum caeruleum (Hornem.) P.Karst. | A. H. Smith 19781 | 16 Oct 1944 | United States of America | Oregon | Clackamas Co. Rhododendron | — |  |  |  |  | 
                       
                        
                            
                            
                                | Hydnellum aurantiacum (Batsch:Fr.) P.Karst. | A. H. Smith 59831 | 09 Aug 1958 | United States of America | Idaho | Valley Co. Payette Lakes | — |  |  |  |  | 
                       
                        
                            
                            
                                | Hydnellum suaveolens (Scop.) P.Karst. | R. L. Gilbertson 2134 | 14 Sep 1958 | United States of America | Idaho | Valley Co. Payette Lakes. | — |  |  |  |  | 
                       
                        
                            
                            
                                | Hydnellum caeruleum (Hornem.) P.Karst. | O. K. Miller 3325 | 1959 | United States of America | Michigan | Marquette | — |  |  |   |  | 
                       
                        
                            
                            
                                | Hydnellum velutinum (Fr.) P.Karst. | A. L. Welden | 21 Aug 1961 | United States of America | Mississippi | Jasper Co. 1 mile south… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Hydnellum velutinum (Fr.) P.Karst. | A. L. Welden | 21 Aug 1961 | United States of America | Mississippi | Jasper Co. 1 mile south… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Hydnellum velutinum (Fr.) P.Karst. | A. L. Welden | 21 Aug 1961 | United States of America | Mississippi | Jasper Co. 1 mile south… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Hydnellum velutinum (Fr.) P.Karst. | A. L. Welden | 21 Aug 1961 | United States of America | Mississippi | Jasper Co. 1 mile south… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Hydnellum caeruleum (Hornem.) P.Karst. | — | 15 Sep 1962 | Denmark | — | Rind Plantage, Herning | — |  |  |  |  | 
                       
                        
                            
                            
                                | Hydnellum aurantiacum (Batsch:Fr.) P.Karst. | — | 15 Sep 1962 | Denmark | — | Rind Plantage, ved Herning | — |  |  |  |  | 
                       
                        
                            
                            
                                | Hydnellum caeruleum (Hornem.) P.Karst. | O. K. Miller s.n. | 19 Oct 1963 | United States of America | Idaho | Latah Co. Moscow Mountain near… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Hydnellum aurantiacum (Batsch:Fr.) P.Karst. | R. T. Haard | 17 Jul 1965 | United States of America | Michigan | Emmet Co. Sturgeon Bay | — |  |  |  |  | 
                       
                        
                            
                            
                                | Hydnellum aurantiacum (Batsch:Fr.) P.Karst. | O. K. Miller 4389 | 21 Jul 1966 | United States of America | Montana | Avalanche Trail, Glacier National Park | — |  |  |  |  | 
                       
                        
                            
                            
                                | Hydnellum ferrugineum (Fr.:Fr.) P.Karst. | A. L. Welden s.n. | 01 Sep 1968 | United States of America | Ohio | Delaware Co. Lazarus Boy Scout… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Hydnellum ferrugineum (Fr.:Fr.) P.Karst. | A. L. Welden s.n. | 01 Sep 1968 | United States of America | Ohio | Hocking Co. Hocking State Forest | — |  |  |  |  | 
                       
                        
                            
                            
                                | Hydnellum ferrugineum (Fr.:Fr.) P.Karst. | A. L. Welden s.n. | 01 Sep 1968 | United States of America | Ohio | Hocking Co. Hocking State Forest | — |  |  |  |  | 
                       
                        
                            
                            
                                | Hydnellum P.Karst. | O. K. Miller 7935 | 04 Aug 1969 | United States of America | Alaska | vicinity of Taku Lodge, Taku… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Hydnellum aurantiacum (Batsch:Fr.) P.Karst. | O. K. Miller 8966 | 20 Jul 1971 | United States of America | Montana | Mission Wells, Flathead Ind. Res. | — |  |  |  |  | 
                       
                        
                            
                            
                                | Hydnellum caeruleum (Hornem.) P.Karst. | G. Laursen s.n. | 1973 | United States of America | Montana | Park Co. Mission Creek | — |  |  |  |  | 
                       
                        
                            
                            
                                | Hydnellum aurantiacum (Batsch:Fr.) P.Karst. | O. K. Miller 9978 | 08 Aug 1975 | United States of America | Montana | Schafer Air Strip, Flathead National… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Hydnellum P.Karst. | O. K. Miller 15651 | 20 Aug 1976 | United States of America | Alaska | Fairbanks North Star Borough. Edge… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Hydnellum P.Karst. | O. K. Miller 15730 | 22 Aug 1976 | United States of America | Alaska | Entrance to McKinley Pk, Rt… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Hydnellum P.Karst. | O. K. Miller 18355 | 21 Aug 1979 | United States of America | Alaska | mi 3.3 Deadwood Creek Rd,… | — |  |  |  |  |