| Leptodictyum riparium (Hedw.) Warnst. | Roy | — | Canada | Ontario | Royston | — |  |  |  |  | 
                       
                        
                            
                            
                                | Pterogonium gracile (Hedw.) Sm. | Roy | — | United States of America | California |  | — |  |  |  |  | 
                       
                        
                            
                            
                                | Sanionia uncinata (Hedw.) Loeske | Roy 1 | 1875 | Canada | Ontario | Lake Superior | — |  |  |  |  | 
                       
                        
                            
                            
                                | Rhytidiadelphus triquetrus (Hedw.) Warnst. | Roy 8 | — | Canada | Nova Scotia | Owen Sound | — |  |  |  |  | 
                       
                        
                            
                            
                                | Polytrichastrum alpinum (Hedw.) G.L.Sm. | Roy | 1875 | Canada | Ontario | Lake Superior | — |  |  |  |  | 
                       
                        
                            
                            
                                | Ricciella fluitans (L.) A.Br. | Roy | 1875 | United States of America | Michigan | Lake Huron | — |  |  |  |  | 
                       
                        
                            
                            
                                | Orthotrichum ohioense Sull. & Lesq. | Roy 18 | — | United States of America | — | Royston Park | — |  |  |  |  | 
                       
                        
                            
                            
                                | Dicranum scoparium Hedw. | Roy | 20 Jul 1880 | United States of America | Maine | Peak's Island | — |  |  |  |  | 
                       
                        
                            
                            
                                | Serpoleskea subtilis (Hedw.) Loeske | Roy | 1876 | Canada | Ontario | Lake Superior | — |  |  |  |  | 
                       
                        
                            
                            
                                | Lepidozia reptans (L.) Dumort. | Roy | 1867 | United States of America | New Hampshire | Grafton Co. | — |  |  |  |  | 
                       
                        
                            
                            
                                | Hypnum subimponens Lesq. | Roy 7 | 1894 | United States of America | California | Shasta Springs, valleé du Sacramento… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Lewinskya striata (Hedw.) F.Lara, Garilleti & Goffinet | Roy 14 | — | Canada | — |  | — |  |  |  |  | 
                       
                        
                            
                            
                                | Brachythecium frigidum (Müll.Hal.) Besch. | Roy | — | United States of America | California |  | — |  |  |  |  | 
                       
                        
                            
                            
                                | Fissidens grandifrons Brid. | Roy 36 | — | United States of America | California |  | — |  |  |  |  | 
                       
                        
                            
                            
                                | Fissidens ventricosus Lesq. | Roy 63 | — | United States of America | Oregon | New Sp[ring]s | — |  |  |  |  | 
                       
                        
                            
                            
                                | Heterocladium procurrens (Mitt.) A.Jaeger | Roy | — | Canada | — |  | — |  |  |  |  | 
                       
                        
                            
                            
                                | Plagiochila porelloides (Torr. ex Nees) Lindenb. | Roy | — | Canada | Ontario | Royster Park | — |  |  |  |  | 
                       
                        
                            
                            
                                | Kindbergia oregana (Sull.) Ochyra | Roy 23 | — | United States of America | California |  | — |  |  |  |  | 
                       
                        
                            
                            
                                | Antitrichia californica Sull. | Roy 26 | — | United States of America | California |  | — |  |  |  |  | 
                       
                        
                            
                            
                                | Antitrichia californica Sull. | Roy 28 | — | Canada | — |  | — |  |  |  |  | 
                       
                        
                            
                            
                                | Acalypha membranacea A.Rich. | Roy s.n. | 17 Jun 1925 | Cuba | Pinar del Río | At the foot of Mogote… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Acalypha pendula C.Wright ex Griseb. | Roy 2553 | 17 Jun 1923 | Cuba | Pinar del Río | Mogate del La Jagua, Gousala… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Datronia mollis (Sommerf.:Fr.) Donk | Roy s.n. | 1879 | Canada | Ontario | Owen Sound [?] | — |  |  |   |  | 
                       
                        
                            
                            
                                | Coniophora mustialaensis (P.Karst.) Massee | Roy s.n. | s.d. | Canada | Ontario | "Roy State Park" [illegible] | — |  |  |   |  | 
                       
                        
                            
                            
                                | Valsa pulchella (Pers.) Fr. | Roy 55 | s.d. | — | — |  | — |  |  |   |  |