For more information see the Supplementary Notes for the Taxon Dictionary, which explains the names and synonyms, and these Instructions on how to use the online Taxon Dictionary which includes details of the Conservation Evaluation codes.
| Count | Name | Authority | Is Current Name? | Current Taxon Name | Synonyms | BLS Number | Comments | Conservation Evaluation | Group | Account & Map |
|---|---|---|---|---|---|---|---|---|---|---|
| 7231 | Randlanea usneicola | Zhurb, Diederich & U. Braun (2023) | Yes | Randlanea usneicola | 2876 | NE NR | LF | |||
| 7232 | Raphiospora arenicola | Mudd (1861) | No | Arthrorhaphis grisea | 313 | LC NS | LF | |||
| 7233 | Raphiospora flavovirescens | A. Massal. (1853) | No | Arthrorhaphis citrinella | 100 | LC | ||||
| 7234 | Reconditella physconiarum | Hafellner & Matzer (1990) | Yes | Reconditella physconiarum | 2490 | NE NR | LF | Reconditella physconiarum | ||
| 7235 | Refractohilum achromaticum | (B. Sutton) D. Hawksw. (1997) | Yes | Refractohilum achromaticum | 2485 | NE NR | LF | |||
| 7236 | Refractohilum galligenum | D. Hawksw. (1977) | Yes | Refractohilum galligenum | 2182 | NE NS | LF | Refractohilum galligenum | ||
| 7237 | Refractohilum peltigerae | (Keissl.) D. Hawksw. | Yes | Refractohilum peltigerae | 2861 | on Peltigera | NE NR | LF | ||
| 7238 | Refractohilum pluriseptatum | Etayo & Cl. Roux (1997) | Yes | Refractohilum pluriseptatum | 2183 | NE NR | LF | Refractohilum pluriseptatum | ||
| 7239 | Reichlingia anombrophila | (Coppins & P. James) Frisch (2020) | Yes | Reichlingia anombrophila | Arthonia anombrophila; Arthonia cinereopruinosa auct. brit. | 1588 | LC NS Sc IR | Reichlingia anombrophila | ||
| 7240 | Reichlingia dendritica | (Leight.) Ertz & Sanderson (2020) | Yes | Reichlingia dendritica | Arthonia atlantica; Arthonia atlantica var. positiva | 53 | NT NR P Eng Sc Wa IR | Reichlingia dendritica | ||
| 7241 | Reichlingia leopoldii | Diederich & Scheid. (1996) | Yes | Reichlingia leopoldii | 2386 | DD NR Sc | Reichlingia leopoldii | |||
| 7242 | Reichlingia zwackhii | (Sandst.) Frisch & G. Thor (2014) | Yes | Reichlingia zwackhii | Arthonia zwackhii | 74 | NT NR Sc | Reichlingia zwackhii | ||
| 7243 | Rhacodiopsis rupestris | (Pers.) Donk | No | Racodium rupestre | 1229 | LC | ||||
| 7244 | Rhagadostoma lichenicola | (De Not.) Keissl. (1930) | Yes | Rhagadostoma lichenicola | 2184 | lichenicolous on Solorina crocea | NE NR | LF | Rhagadostoma lichenicola | |
| 7245 | Rhagadostoma rugosum | Nav.-Ros. & Hladún (1994) | Yes | Rhagadostoma rugosum | 2185 | NE NR | LF | |||
| 7246 | Rhagadostoma verrucariarum | Nav.-Ros. & Hladún (1994) | Yes | Rhagadostoma verrucariarum | 2802 | lichenicolous on Verrucaria s. lat. | NE NR | LF | ||
| 7247 | Rhaphidicyrtis trichosporella | (Nyl.) Vain. (1921) | Yes | Rhaphidicyrtis trichosporella | 1799 | LC NS | Rhaphidicyrtis trichosporella | |||
| 7248 | Rhexophiale rhexoblephara | (Nyl.) Hellb. (1875) | Yes | Rhexophiale rhexoblephara | Sagiolechia rhexoblephara | 1303 | NT NR Sc | Rhexophiale rhexoblephara | ||
| 7249 | Rhizocarpon advenulum | (Leight.) Hafellner & Poelt (1976) | Yes | Rhizocarpon advenulum | Buellia advenula | 1956 | NE NR Sc | LF | Rhizocarpon advenulum | |
| 7250 | Rhizocarpon alboatrum | (Hoffm.) Anzi | No | Diplotomma alboatrum | 496 | LC | ||||
| 7251 | Rhizocarpon alboatrum var. epipolium | auct. p.p. | No | Diplotomma alboatrum | 496 | LC | ||||
| 7252 | Rhizocarpon alboatrum var. epipolium | (Ach.) A.L. Sm. | No | Diplotomma hedinii | 498 | LC NS | ||||
| 7253 | Rhizocarpon alboatrum var. venustum | auct. brit. p.max.p. | No | Diplotomma alboatrum | 496 | LC | ||||
| 7254 | Rhizocarpon alboatrum var. venustum | auct. brit. p.min.p. | No | Diplotomma hedinii | 498 | LC NS | ||||
| 7255 | Rhizocarpon alpicola | (Anzi) Rabenh. (1861) | Yes | Rhizocarpon alpicola | 1245 | LC NS | Rhizocarpon alpicola | |||
| 7256 | Rhizocarpon amphibium | (Fr.) Th. Fr. (1874) | Yes | Rhizocarpon amphibium | 1683 | DD NR Sc | Rhizocarpon amphibium | |||
| 7257 | Rhizocarpon anaperum | (Vain.) Vain. (1922) | Yes | Rhizocarpon anaperum | 1099 | LC NR Sc | Rhizocarpon anaperum | |||
| 7258 | Rhizocarpon atlanticum | I.M. Lamb | No | Rhizocarpon richardii | 1250 | LC | ||||
| 7259 | Rhizocarpon atroalbescens | (Nyl.) Zahlbr. | No | Rhizocarpon eupetraeoides | 1253 | DD NR Sc | ||||
| 7260 | Rhizocarpon badioatrum | (Flörke ex Spreng.) Th. Fr. (1874) | Yes | Rhizocarpon badioatrum | 1246 | LC NS Sc | Rhizocarpon badioatrum |