The page lists lichen species that are threatened or near threatened, ie Critically Endangered (CR), Endangered (EN), Vulnerable (VU) or Near Threatened (NT).
| Count | Name | Conservation Evaluation |
|---|---|---|
| 1 | Ramalina chondrina | VU D2 NR |
| 2 | Ramalina polymorpha | NT NS |
| 3 | Ramboldia insidiosa | NT NR Sc |
| 4 | Ramonia chrysophaea | NT NS P Eng Sc Wa IR |
| 5 | Ramonia dictyospora | NT NS E P Eng Sc Wa IR |
| 6 | Ramonia melathelia | NT NR Sc |
| 7 | Ramonia nigra | CR D NR E Eng IR |
| 8 | Reichlingia dendritica | NT NR P Eng Sc Wa IR |
| 9 | Reichlingia zwackhii | NT NR Sc |
| 10 | Rhexophiale rhexoblephara | NT NR Sc |
| 11 | Rhizocarpon furfurosum | NT NS M* |
| 12 | Rhizocarpon ridescens | NT NR Sc |
| 13 | Rinodina aspersa | NT NR Sc |
| 14 | Rinodina cinnamomea | EN D NR Sc |
| 15 | Rinodina colobinoides | VU D1+2 NR |
| 16 | Rinodina flavosoralifera | NT NR Sc |
| 17 | Rinodina interpolata | NT NR Sc |
| 18 | Rinodina isidioides | NT NS P Eng Sc Wa IR |
| 19 | Rinodina milvina | NT NR Sc |
| 20 | Rinodina roboris var. armeriicola | NT NR |
| 21 | Rinodina subpariata | VU D1+2 NR P Sc |
| 22 | Roccella fuciformis | NT NS |
| 23 | Roccella phycopsis | NT NS |
| 24 | Rostania ceranisca | VU D1, D2 NR Sc |
| 25 | Rostania occultata | NT NS Sc |