| Orthotrichum hallii Sull. & Lesq. | T. Drummond s.n. | s.d. | Canada | Ontario | Upper Canada | — |  |  |  |  | 
                       
                        
                            
                            
                                | Orthotrichum hallii Sull. & Lesq. | T. Drummond s.n. | s.d. | Canada | — |  | — |  |  |  |  | 
                       
                        
                            
                            
                                | Orthotrichum hallii Sull. & Lesq. | — | — | United States of America | Tennessee | Davidson Co. Nashville | — |  |  |  |  | 
                       
                        
                            
                            
                                | Orthotrichum hallii Sull. & Lesq. | W. Johnson J-11 | 20 May 1951 | United States of America | Colorado | Saguache Co. Crestone Creek Canyon | — |  |  |  |  | 
                       
                        
                            
                            
                                | Orthotrichum hallii Sull. & Lesq. | E. Lawton 2881 | 05 Jul 1955 | United States of America | Nevada | White Pine Co. Snake Mountains,… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Orthotrichum hallii Sull. & Lesq. | L. N. Goodding 125 | 25 Jun 1901 | United States of America | Wyoming | Natrona Co. Chimneys of Pedro… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Orthotrichum hallii Sull. & Lesq. | L. N. Goodding 125 | 27 Jun 1901 | United States of America | Wyoming | Carbon Co. Platte Cañon | — |  |  |  |  | 
                       
                        
                            
                            
                                | Orthotrichum hallii Sull. & Lesq. | P. C. Standley 10711 | 21 Aug 1914 | United States of America | New Mexico | Rio Arriba Co. Brazos Canyon | — |  |  |  |  | 
                       
                        
                            
                            
                                | Orthotrichum hallii Sull. & Lesq. | J. Flock see Collection notes | 17 May 1988 | United States of America | Colorado | Boulder Co. University of Colorado… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Orthotrichum hallii Sull. & Lesq. | D. H. Norris 47942 | 28 Nov 1976 | United States of America | California | Glenn Co. 2 miles east… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Orthotrichum hallii Sull. & Lesq. | D. H. Vitt 36150 | 10 Aug 1991 | United States of America | New Mexico | San Miguel Co. Santa Fe… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Orthotrichum hallii Sull. & Lesq. | D. H. Vitt 35367 | 05 Jun 1990 | United States of America | Wyoming | Carbon Co. 14.8 km east… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Orthotrichum hallii Sull. & Lesq. | I. M. Haring 3616 | 03 Oct 1944 | United States of America | Arizona | Grand Canyon National Park, Coronado… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Orthotrichum hallii Sull. & Lesq. | J. M. Holzinger | 04 Jun 1896, 05 Jun 1896 | United States of America | Colorado | El Paso Co. Below the… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Orthotrichum hallii Sull. & Lesq. | L. N. Goodding s.n. | 27 Jun 1901 | United States of America | Wyoming | Natrona Co. Platte Cañon | — |  |  |  |  | 
                       
                        
                            
                            
                                | Orthotrichum hallii Sull. & Lesq. | A. J. Grout | July 1914 | United States of America | Colorado | Ledge of road to Rollinsville… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Orthotrichum hallii Sull. & Lesq. | E. Hall | May 1872 | United States of America | Colorado | Rocky Mts. | type fragment |  |  |   |  | 
                       
                        
                            
                            
                                | Orthotrichum hallii Sull. & Lesq. | S. Flowers 5507 | 16 May 1958 | United States of America | Utah | Millard Co. Canyon Mts., Oak… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Orthotrichum hallii Sull. & Lesq. | S. Flowers 9789 | 22 Aug 1964 | United States of America | Colorado | Douglas Co. Rampart Range, Devils… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Orthotrichum hallii Sull. & Lesq. | S. Flowers 9797 | 22 Aug 1964 | United States of America | Colorado | Douglas Co. Rampart Range, Devils… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Orthotrichum hallii Sull. & Lesq. | S. Flowers 5511 | 16 May 1958 | United States of America | Utah | Millard Co. Canyon Mts., Oak… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Orthotrichum hallii Sull. & Lesq. | S. Flowers 9311 | 23 May 1964 | United States of America | Utah | Washington Co. Pine Valley Mts.,… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Orthotrichum hallii Sull. & Lesq. | S. Flowers 9791 | 22 Aug 1964 | United States of America | Colorado | Douglas Co. Rampart Range, Devils… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Orthotrichum hallii Sull. & Lesq. | S. Flowers 8283 | 18 Sep 1954 | United States of America | Utah | Garfield Co. Henry Mts., Mt.… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Orthotrichum hallii Sull. & Lesq. | S. Flowers 2276 | 10 Aug 1939 | United States of America | Utah | Daggett Co. Carter Creek | — |  |  |  |  |