| Coscinodon calyptratus (Drumm.) C.E.O.Jensen | T. C. Porter | Jul 1873 | United States of America | Colorado | [Illegible] Pass. Colorado Springs | — |  |  |  |  | 
                       
                        
                            
                            
                                | Actinella grandiflora var. glabrata Porter | T. C. Porter s.n. | Aug 1874 | United States of America | Colorado | Sangre de Cristo Range, C.… | possible isotype |  |  |   |  | 
                       
                        
                            
                            
                                | Lewinskya laevigata (J.E.Zetterst.) F.Lara, Garilleti & Goffinet | T. C. Porter | Not sure if July 1873 or July 4th 1889 | United States of America | Colorado | Arkansas River | — |  |  |  |  | 
                       
                        
                            
                            
                                | Aster cordifolius var. lanceolatus Porter | T. C. Porter s.n. | Oct 1888 | United States of America | Pennsylvania | Northampton Co. Easton | syntype |  |  |   |  | 
                       
                        
                            
                            
                                | Aster cordifolius var. lanceolatus Porter | T. C. Porter s.n. | 29 Sep 1886 | United States of America | Pennsylvania | Northampton Co. Easton | lectotype |  |  |   |  | 
                       
                        
                            
                            
                                | Suaeda depressa var. erecta S.Watson | T. C. Porter s.n. | 08 Aug 1871 | United States of America | Montana | Crow Agency, Montana Ter.; Hayden | possible syntype |  |  |   |  | 
                       
                        
                            
                            
                                | Hygrohypnum ochraceum (Turner ex Wilson) Loeske | T. C. Porter | — | United States of America | Pennsylvania | Clarion Co. Near Easton. [Inferred… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Eremogone congesta (Nutt.) Ikonn. var. congesta | T. C. Porter s.n. | 19 Jul 1873 | United States of America | — | Uinta Mountains, Utah Territory. | — |  |  |   |  | 
                       
                        
                            
                            
                                | Eremogone congesta (Nutt.) Ikonn. var. congesta | T. C. Porter s.n. | 19 Jul 1873 | United States of America | — | Uinta Mountains, Utah Territory. | — |  |  |   |  | 
                       
                        
                            
                            
                                | Eremogone congesta (Nutt.) Ikonn. var. congesta | T. C. Porter s.n. | 25 Sep 1870 | United States of America | Wyoming | Unita Mtns. | — |  |  |   |  | 
                       
                        
                            
                            
                                | Thalictrum alpinum L. | T. C. Porter s.n. | 25 Jul 1873 | United States of America | Utah | Uinta Mountains | — |  |  |   |  | 
                       
                        
                            
                            
                                | Thalictrum alpinum L. | T. C. Porter s.n. | 25 Jul 1873 | United States of America | Utah | Uinta Mountains | — |  |  |   |  | 
                       
                        
                            
                            
                                | Thalictrum scopulorum Greene | T. C. Porter s.n. | 25 Jul 1873 | United States of America | Utah | Uinta Mountains | not a type |  |  |   |  | 
                       
                        
                            
                            
                                | Polytrichum pallidisetum Funck | T. C. Porter | — | United States of America | Pennsylvania | Monroe Co. Canadensis | — |  |  |  |  | 
                       
                        
                            
                            
                                | Brachythecium rivulare Schimp. | T. C. Porter | — | United States of America | Pennsylvania | Clarion Co. Near Easton. [Inferred… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Solidago porteri Small | T. C. Porter s.n. | 01 Sep 1846 | United States of America | Georgia | Monticello | holotype |  |  |   |  | 
                       
                        
                            
                            
                                | Solidago porteri Small | T. C. Porter s.n. | 01 Sep 1846 | United States of America | Georgia | Middle Georgia | isotype |  |  |   |  | 
                       
                        
                            
                            
                                | Solidago porteri Small | T. C. Porter s.n. | 01 Sep 1846 | United States of America | Georgia | Middle Georgia | isotype |  |  |   |  | 
                       
                        
                            
                            
                                | Lupinus cusickii S.Watson | T. C. Porter 1361 | Jul 1866 | United States of America | Oregon | Upper Bu[?] River | isotype |  |  |   |  | 
                       
                        
                            
                            
                                | Dicranum fuscescens Turner | T. C. Porter | Aug 1873 | United States of America | Colorado | Eagle River | — |  |  |  |  | 
                       
                        
                            
                            
                                | Thamnobryum alleghaniense (Müll.Hal.) Nieuwl. | T. C. Porter | 1871 | United States of America | Pennsylvania | Bucks Co. Nockamixon Cliffs | — |  |  |  |  | 
                       
                        
                            
                            
                                | Ceratodon purpureus (Hedw.) Brid. | T. C. Porter | Jul 1873 | United States of America | Colorado | Glen Eyie | — |  |  |  |  | 
                       
                        
                            
                            
                                | Calamagrostis porteri A.Gray | T. C. Porter s.n. | 1862 | United States of America | Pennsylvania | In montosis Pennsylvaniae | isotype |  |  |   |  | 
                       
                        
                            
                            
                                | Grayia spinosa (Hook.) Moq. | T. C. Porter 10373 | 04 Aug 1873 | United States of America | Wyoming | Fort Bridger | — |  |  |   |  | 
                       
                        
                            
                            
                                | Bryoerythrophyllum recurvirostre (Hedw.) P.C.Chen | T. C. Porter | 28 Aug 1871 | United States of America | Maine | Mt. Kines, Moosehead Lake | — |  |  |  |  |