| Kyllinga peruviana Lam. | P. C. Standley 25139 | 02 Jun 1922-06 Jun 1922 | Guatemala | Izabal | Vicinity of Puerto Barrios. | — |  |  |  |  | 
                       
                        
                            
                            
                                | Brachythecium collinum (Schleich. ex Müll.Hal.) Schimp. | P. C. Standley 1171 | 06 Sep 1914 | United States of America | New Mexico | Rio Arriba Co. Brazos Canyon | — |  |  |  |  | 
                       
                        
                            
                            
                                | Brachythecium collinum (Schleich. ex Müll.Hal.) Schimp. | P. C. Standley 10995 | 01 Sep 1914 | United States of America | New Mexico | Rio Arriba Co. Brazos Canyon | — |  |  |  |  | 
                       
                        
                            
                            
                                | Anneslia yoroensis Britton & Rose | P. C. Standley 55053 | 24 Jan 1928 | Honduras | Yoro | Near Progreso | type |  |  |   |  | 
                       
                        
                            
                            
                                | Cashalia cuscatlanica Standl. | P. C. Standley 20197 | 17 Jan 1922-19 Jan 1922 | El Salvador | Ahuachapán | In forest, Sierra de Apaneca,… | isotype |  |  |   |  | 
                       
                        
                            
                            
                                | Hieracium novo-mexicanum Wooton & Standl. | P. C. Standley 4418 | 19 Jul 1908 | United States of America | New Mexico | In the Pecos River National… | type |  |  |   |  | 
                       
                        
                            
                            
                                | Axonopus capillaris (Lam.) Chase | P. C. Standley 24179 | 16 Oct 1949 | Honduras | — | Dept. Morazán: Río de la… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Erythrina hondurensis Standl. | P. C. Standley 54411 | 06 Dec 1927 | Honduras | Atlántida | Lancetilla Valley, near Tela. Alt.… | type fragment |  |  |   |  | 
                       
                        
                            
                            
                                | Drepanocladus capillifolius (Warnst.) Warnst. | P. C. Standley 11210 | 08 Sep 1914 | United States of America | New Mexico | Rio Arriba Co. Brazos Canyon | — |  |  |  |  | 
                       
                        
                            
                            
                                | Piper guazacapanense Trel. | P. C. Standley 79461 | 06 Dec 1940 | Guatemala | Santa Rosa | Along the Avellana road, south… | isotype |  |  |   |  | 
                       
                        
                            
                            
                                | Polypodium standleyi Maxon | P. C. Standley 84560 | 23 Jan 1940 | Guatemala | Totonicapán | Pacajá, region of Desconsuelo, mountains… | possible type |  |  |   |  | 
                       
                        
                            
                            
                                | Tounatea standleyi Britton & Rose | P. C. Standley 25069 | 02 Jun 1922-06 Jun 1922 | Guatemala | Izabal | Vicinity of Puerto Barrios, at… | holotype |  |  |   |  | 
                       
                        
                            
                            
                                | Justicia corynimorpha D.N.Gibson | P. C. Standley 75969 | 01 Nov 1940 | Guatemala | Jutiapa | Between Jutiapa and La Burrera,… | isotype |  |  |   |  | 
                       
                        
                            
                            
                                | Marchantia paleacea Bertol. | P. C. Standley 57904 | 25 Nov 1938 | Guatemala | Chimaltenango |  | — |  |  |  |  | 
                       
                        
                            
                            
                                | Marchantia paleacea Bertol. | P. C. Standley 64644 | 06 Feb 1939 | Guatemala | — | Along Rio Guacalate NW Antigua. | — |  |  |  |  | 
                       
                        
                            
                            
                                | Esenbeckia echinoidea Standl. & Steyerm. | P. C. Standley 74456 | 15 Oct 1940 | Guatemala | Chiquimula | Between Ramírez and Cumbre de… | isotype |  |  |   |  | 
                       
                        
                            
                            
                                | Senna holwayana var. absoidea H.S.Irwin & Barneby | P. C. Standley 74800 | 14 Oct 1940 | Guatemala | Zacapa | On hills above the village… | holotype fragment |  |  |   |  | 
                       
                        
                            
                            
                                | Chamaefistula membranacea Britton & Rose | P. C. Standley 19430 | 30 Dec 1921-31 Dec 1921 | El Salvador | San Salvador | Vicinity of Tonacatepeque | holotype |  |  |   |  | 
                       
                        
                            
                            
                                | Swartzia costaricensis (Britton) N.Zamora | P. C. Standley 44407 | 10 Jan 1926-31 Jan 1926 | Costa Rica | Guanacaste | Vicinity of Tilarán | type |  |  |   |  | 
                       
                        
                            
                            
                                | Spigelia carnosa Standl. & Steyerm. | P. C. Standley 90272 | 29 Mar 1941 | Guatemala | Alta Verapaz | Río Tzimajil, near Cobán | type |  |  |   |  | 
                       
                        
                            
                            
                                | Juniperus communis L. | P. C. Standley 14603 | 09 Sep 1916 | United States of America | New Mexico | Colfax Co. Vicinity of Ute… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Erigeron pecosensis Standl. | P. C. Standley 4358 | 17 Jul 1908 | United States of America | New Mexico | Pecos River National Forest: along… | isotype |  |  |   |  | 
                       
                        
                            
                            
                                | Dumortiera hirsuta (Sw.) Nees | P. C. Standley 71204 | 09 Apr 1934 | Guatemala | — | Mountains east of Tactic. | — |  |  |  |  | 
                       
                        
                            
                            
                                | Dumortiera hirsuta (Sw.) Nees | P. C. Standley 64349 | 03 Feb 1939 | Guatemala | Chimaltenango | Near Rio Pincayó. | — |  |  |  |  | 
                       
                        
                            
                            
                                | Dumortiera hirsuta (Sw.) Nees | P. C. Standley 47413 | 04 Dec 1925-10 Feb 1926 | Costa Rica | San José |  | — |  |  |  |  |