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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 7321 | Ramonia nigra | Coppins (1987) | No | Karstenia nigra | 1725 | CR D NR E Eng IR | ||||
| 7322 | Ramularia peltigericola | D. Hawksw. (1980) | No | Hawksworthiana peltigerae | 2069 | NE NR | LF | |||
| 7323 | Randlanea usneicola | Zhurb., Diederich & U. Braun (2023) | Yes | Randlanea usneicola | 2876 | NE NR | LF | Randlanea usneicola | ||
| 7324 | Raphiospora arenicola | Mudd (1861) | No | Arthrorhaphis grisea | 313 | LC NS | LF | |||
| 7325 | Raphiospora flavovirescens | A. Massal. (1853) | No | Arthrorhaphis citrinella | 100 | LC | ||||
| 7326 | Reconditella physconiarum | Hafellner & Matzer (1990) | Yes | Reconditella physconiarum | 2490 | NE NR | LF | Reconditella physconiarum | ||
| 7327 | Refractohilum achromaticum | (B. Sutton) D. Hawksw. (1997) | No | Gyalectiphila achromatica | 2485 | NE NR | LF | |||
| 7328 | Refractohilum galligenum | D. Hawksw. (1977) | Yes | Refractohilum galligenum | 2182 | NE NS | LF | Refractohilum galligenum | ||
| 7329 | Refractohilum peltigerae | (Keissl.) D. Hawksw. (1977) | No | Hawksworthiana peltigerae | 2069 | on Peltigera | NE NR | LF | Refractohilum peltigerae | |
| 7330 | Refractohilum pluriseptatum | Etayo & Cl. Roux (1997) | No | Gyalectiphila pluriseptata | 2183 | NE NR | LF | |||
| 7331 | Rehmia amphibia | (Fr.) E.J. Möller, Timdal, Haugan & Bendiksby (2025) | No | Rhizocarpon amphibium | 1683 | DD NR Sc | ||||
| 7332 | Rehmia anapera | (Vain.) E.J. Möller, Timdal, Haugan & Bendiksby (2025) | No | Rhizocarpon anaperum | 1099 | LC NR Sc | ||||
| 7333 | Rehmia caeruleoalba | No | Rhizocarpon caeruleoalbum | 1247 | DD NR Sc | |||||
| 7334 | Rehmia chionea | (Norman) E.J. Möller, Timdal, Haugan & Bendiksby (2025) | No | Rhizocarpon chioneum | 1248 | DD NR Sc | ||||
| 7335 | Rehmia cinereovirens | (Müll. Arg.) E.J. Möller, Timdal, Haugan & Bendiksby (2025) | No | Rhizocarpon cinereovirens | 1800 | DD NR Sc M* | ||||
| 7336 | Rehmia furfurosa | (H. Magn. & Poelt) E.J. Möller, Timdal, Haugan & Bendiksby (2025) | No | Rhizocarpon furfurosum | 1694 | NT NS M* | ||||
| 7337 | Rehmia lavata | (Fr.) E.J. Möller, Timdal, Haugan & Bendiksby (2025) | No | Rhizocarpon lavatum | 1264 | LC | ||||
| 7338 | Rehmia petraea | (Wulfen) E.J. Möller, Timdal, Haugan & Bendiksby (2025) | No | Rhizocarpon petraeum | 1249 | LC | ||||
| 7339 | Rehmia postuma | (Nyl.) E.J. Möller, Timdal, Haugan & Bendiksby (2025) | No | Rhizocarpon postumum | 1271 | DD NR | ||||
| 7340 | Rehmia reducta | (Th Fr.) E.J. Möller, Timdal, Haugan & Bendiksby (2025) | No | Rhizocarpon reductum | 1266 | LC | ||||
| 7341 | Rehmia rubescens | (Th Fr.) E.J. Möller, Timdal, Haugan & Bendiksby (2025) | No | Rhizocarpon rubescens | 1275 | NE NR | ||||
| 7342 | Rehmia subpostuma | (Arnold) E.J. Möller, Timdal, Haugan & Bendiksby (2025) | No | Rhizocarpon subpostum | 1214 | DD NR Sc | ||||
| 7343 | Rehmia timdalii | (Ihlen & Fryday) E.J. Möller, Timdal, Haugan & Bendiksby (2025) | No | Rhizocarpon timdalii | 2335 | DD NR | ||||
| 7344 | Rehmia umbilicata | (Ramond) E.J. Möller, Timdal, Haugan & Bendiksby (2025) | No | Rhizocarpon umbilicatum | 1279 | LC | ||||
| 7345 | Reichlingia anombrophila | (Coppins & P. James) Frisch (2020) | Yes | Reichlingia anombrophila | Arthonia anombrophila; Arthonia cinereopruinosa auct. brit. | 1588 | LC NS Sc IR | Reichlingia anombrophila | ||
| 7346 | 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 | ||
| 7347 | Reichlingia leopoldii | Diederich & Scheid. (1996) | Yes | Reichlingia leopoldii | 2386 | DD NR Sc | Reichlingia leopoldii | |||
| 7348 | Reichlingia zwackhii | (Sandst.) Frisch & G. Thor (2014) | Yes | Reichlingia zwackhii | Arthonia zwackhii | 74 | NT NR Sc | Reichlingia zwackhii | ||
| 7349 | Rhacodiopsis rupestris | (Pers.) Donk | No | Racodium rupestre | 1229 | LC | ||||
| 7350 | Rhagadostoma lichenicola | (De Not.) Keissl. (1930) | Yes | Rhagadostoma lichenicola | 2184 | lichenicolous on Solorina crocea | NE NR | LF | Rhagadostoma lichenicola |