| Parmelia saximontana R.A.Anderson & W.A.Weber | R. A. Anderson | W. A. Weber L-30072 | 06 Apr 1962 | United States of America | Colorado | Boulder Co. Just northwest of… | isotype |  |  |  |  | 
                       
                        
                            
                            
                                | Hymenostylium recurvirostrum (Hedw.) Dixon | W. A. Weber (NIU16878) | 18 Aug 1956 | United States of America | Colorado | Gunnison Co. above 'narrows' of… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Achnatherum hymenoides (Roem. & Schult.) Barkworth | W. A. Weber 5 | 25 May 1979 | United States of America | Colorado | Mesa Co. Along old Highway… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Lophoziopsis longidens (Lindb.) Konstant. & Vilnet | W. A. Weber 5.15 | 05 Aug 2005 | United States of America | Colorado | Summit Co. Arapaho National Forest,… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Frullania inflata Gottsche | W. A. Weber 10,635 | 18 Apr 1957 | United States of America | Arizona | Cochise Co. Trail from Rustler's… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Bionectria byssicola (Berk. & Broome) Schroers & Samuels | W. A. Weber 21 | 21 Jan 1964 - 09 Mar 1964 | Ecuador | Galápagos | Isla Santa Cruz (Indefatigable I.):… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Bionectria byssicola (Berk. & Broome) Schroers & Samuels | W. A. Weber 21 | 21 Jan 1964 - 09 Mar 1964 | Ecuador | Galápagos | Isla Santa Cruz (Indefatigable I.):… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Warnstorfia sarmentosa (Wahlenb.) Hedenäs | W. A. Weber 94 | 22 Jul 1955 | United States of America | Colorado | Clear Creek Co. Rocky shore… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Tomentypnum nitens (Hedw.) Loeske | W. A. Weber 123 | 17 Sep 1972 | United States of America | Colorado | Boulder Co. 2-3 mi W… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Plagiomnium ellipticum (Brid.) T.J.Kop. | W. A. Weber 124 | 17 Sep 1972 | United States of America | Colorado | Boulder Co. 2-3 mi W… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Warnstorfia exannulata (Schimp.) Loeske | W. A. Weber 125 | 17 Sep 1972 | United States of America | Colorado | Boulder Co. Hazelwood bog, 2-3… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Barbilophozia hatcheri (A.Evans) Loeske | W. A. Weber 131 | 01 Oct 1972 | United States of America | Colorado | Boulder Co. Boulder Canyon, 1… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Dicranum rhabdocarpum Sull. | W. A. Weber 134 | 01 Oct 1972 | United States of America | Colorado | Boulder Co. Boulder Canyon, 1… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Dicranoweisia crispula (Hedw.) Milde | W. A. Weber 149 | 4-5 Aug 1955 | United States of America | Colorado | Gunnison Co. Trail along Copper… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Pleurozium schreberi (Willd. ex Brid.) Mitt. | W. A. Weber 202 | 09 Oct 1972 | United States of America | Colorado | Larimer Co. Rocky Mt. National… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Roccella gracilis Bory | W. A. Weber 389 | 21 Jan 1964 - 09 Mar 1964 | Ecuador | Galápagos | Santa Cruz (Canton). Indefatigable I.:… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Carex sprengelii Dewey ex Spreng. | W. A. Weber 514 | 28 Apr 1938 | United States of America | Iowa | Story Co. Washington Twp. Hillsides,… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Stereocaulon azulense Yoshim. & W.A.Weber | W. A. Weber 645 | 17 Jan 1984 | Ecuador | Galápagos | Isla Isabela, southwest coast. Cerro… | isotype |  |  |   |  | 
                       
                        
                            
                            
                                | Caloplaca brattiae W.A.Weber | W. A. Weber 660 | 08 Jan 1986 | United States of America | California | Santa Barbara Co. Channel Islands.… | isotype |  |  |   |  | 
                       
                        
                            
                            
                                | Toninia pacifica Timdal | W. A. Weber 663 | 08 Jan 1986 | United States of America | California | Santa Barbara Co. Channel Islands.… | isotype |  |  |   |  | 
                       
                        
                            
                            
                                | Psora pacifica | W. A. Weber 664 | 08 Jan 1986 | United States of America | California | Santa Barbara Co. Channel Islands.… | isotype |  |  |   |  | 
                       
                        
                            
                            
                                | Caloplaca stantonii W.A.Weber ex Arup | W. A. Weber 672 | 25 Mar 1986 | United States of America | California | Santa Barbara Co. Santa Cruz… | isotype |  |  |   |  | 
                       
                        
                            
                            
                                | Hordeum pusillum Nutt. | W. A. Weber 898 | 17 Jun 1959 | United States of America | Colorado | Boulder Co. roadside grass throughout… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Ganoderma curtisii (Berk.) Murrill | W. A. Weber 967 | 02 Feb 1964 | Ecuador | Galápagos | Indefatigable Is. | — |  |  |   |  | 
                       
                        
                            
                            
                                | Pleurozium schreberi (Willd. ex Brid.) Mitt. | W. A. Weber 1031 | 21 Jun 1956-24 Jun 1956 | United States of America | Alaska | Vicinity of Lake Chelatna | — |  |  |  |  | 
                       
                        
                            
                            
                                | Amphiscirpus nevadensis (S.Watson) Oteng-Yeb. | W. A. Weber 1066 | 12 Jul 1960 | United States of America | Colorado | Saguache Co. alkali flat by… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Mnium hornum Hedw. | W. A. Weber 1372 | 17 Jul 1956 | United States of America | Alaska | Junction of the Muldrow Glacier… | — |  |  |  |  | 
                       
                        
                            
                            
                                | Achnatherum x bloomeri (Bol.) Barkworth | W. A. Weber 1901 | 25 May 1979 | United States of America | Colorado | Mesa Co. Along old Highway… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Atriplex graciliflora M.E.Jones | W. A. Weber 1916 | 26 May 1979 | United States of America | Colorado | Mesa Co. road to Badger… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Eriogonum contortum Small & Rydb. | W. A. Weber 1917 | 26 May 1979 | United States of America | Colorado | Mesa Co. Road to Badger… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Astragalus musiniensis M.E.Jones | W. A. Weber 1919 | 26 May 1979 | United States of America | Colorado | Mesa Co. Gently E-facing clat… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Phacelia incana Brand | W. A. Weber 1926 | 27 May 1979 | United States of America | Colorado | Rio Blanco Co. Raven Ridge,… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Cymopterus duchesnensis M.E.Jones | W. A. Weber 1928 | 27 May 1979 | United States of America | Colorado | Rio Blanco Co. Red hills… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Mirabilis alipes (S.Watson) Pilz | W. A. Weber 1935 | 27 May 1979 | United States of America | Colorado | Rio Blanco Co. Raven Ridge,… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Eriogonum tumulosum (Barneby) Reveal | W. A. Weber 1999 | 29 May 1979 | United States of America | Colorado | Moffat Co. Ridgetop 1.2 mi… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Astragalus australis var. glabriusculus (Hook.) Isely | W. A. Weber 2083 | 24 Jul 1982 | United States of America | Colorado | Park Co. Slopes of Mt.… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Poa compressa L. | W. A. Weber 2088 | 24 Jul 1982 | United States of America | Colorado | Park Co. Slopes of Mt.… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Avenula hookeri (Scribn.) Holub | W. A. Weber 2092 | 24 Jul 1982 | United States of America | Colorado | Park Co. Slopes of Mt.… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Festuca brachyphylla subsp. coloradensis Fred. | W. A. Weber 2095 | 25 Jul 1982 | United States of America | Colorado | Park Co. Near the summit… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Festuca baffinensis Polunin | W. A. Weber 2096 | 25 Jul 1982 | United States of America | Colorado | Park Co. Near the summit… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Crepis nana var. ramosa (Babc.) Cronquist | W. A. Weber 2108 | 25 Jul 1982 | United States of America | Colorado | Park Co. Near the summit… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Draba streptobrachia R.A.Price | W. A. Weber 2110 | 25 Jul 1982 | United States of America | Colorado | Park Co. SLOPES OF MT.… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Castilleja puberula Rydb. | W. A. Weber 2114 | 25 Jul 1982 | United States of America | Colorado | Park Co. SLOPES OF MT.… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Erigeron ursinus D.C. Eaton | W. A. Weber 2119 | 25 Jul 1982 | United States of America | Colorado | Park Co. Slopes of Mt.… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Ericameria discoidea var. discoidea | W. A. Weber 2121 | 25 Jul 1982 | United States of America | Colorado | Park Co. Along Kite Lake… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Alnus incana subsp. tenuifolia (Nutt.) Breitung | W. A. Weber 2238 | 02 Jul 1941 | Canada | British Columbia | Open Lodgepole Pine forest along… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Betula occidentalis Hook. | W. A. Weber 2246 | 02 Jul 1941 | Canada | British Columbia | Along banks of Bull River,… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Penstemon lyallii A.Gray | W. A. Weber 2253 | 02 Jul 1941 | Canada | British Columbia | 3 miles north of Elko | — |  |  |   |  | 
                       
                        
                            
                            
                                | Poa interior Rydb. | W. A. Weber 2254 | 02 Jul 1941 | Canada | British Columbia | Burned over woods on a… | — |  |  |   |  | 
                       
                        
                            
                            
                                | Myosotis scorpioides L. | W. A. Weber 2255 | 02 Jul 1941 | Canada | British Columbia | In a stream below a… | — |  |  |   |  |