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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2191 | Collema ramulosum | Hoffm. (1796) | No | Synalissa ramulosa | 1379 | VU B NR P Eng Sc Wa | ||||
| 2192 | Collema rupestre | (Sw.) Rabenh. (1845) | No | Collema flaccidum | 445 | LC | ||||
| 2193 | Collema rupestre var. subfurvum | (Müll. Arg.) Zahlbr. | No | Collema subflaccidum | 457 | LC | ||||
| 2194 | Collema ryssoleum | (Tuck.) A. Schneid. | No | incorrectly reported from the British Isles | ||||||
| 2195 | Collema saturninum | (Dicks.) DC. & Lam. (1805) | No | Leptogium saturninum | 844 | VU C2 NS P Eng Sc | ||||
| 2196 | Collema schraderi | (Bernh.) Ach. (1810) | No | Scytinium schraderi | 845 | LC | ||||
| 2197 | Collema sinuatum | (Huds.) Hoffm. ex Ach. (1810) | No | Scytinium gelatinosum | 846 | LC | ||||
| 2198 | Collema spongiosum | Ach. (1810) | No | Solorina spongiosa | 1331 | LC NS | ||||
| 2199 | Collema stygium | auct. | No | Enchylium polycarpon | 455 | LC NS | ||||
| 2200 | Collema subflaccidum | Degel. (1974) | Yes | Collema subflaccidum | Collema subfurvum | 457 | LC | Collema subflaccidum | ||
| 2201 | Collema subfurvum | auct. | No | Collema subflaccidum | 457 | LC | ||||
| 2202 | Collema subnigrescens | Degel. (1954) | Yes | Collema subnigrescens | 458 | DD NR Sc | Collema subnigrescens | |||
| 2203 | Collema subplicatile | sensu Leight. | No | ? Lathagrium cristatum | ||||||
| 2204 | Collema subplicatile f. meizolobum | Nyl. ex Cromb. (1874) | No | Lathagrium fuscovirens | 463 | LC | ||||
| 2205 | Collema subtile | (Schrad.) Hoffm. (1796) | No | Scytinium subtile | 1717 | LC NS | ||||
| 2206 | Collema symphoreum | (Ach.) DC. | No | Synalissa ramulosa | 1379 | VU B NR P Eng Sc Wa | ||||
| 2207 | Collema tenax var. ceranoides | (Borrer) Degel. (1954) | No | Enchylium tenax var. ceranoides | 460 | LC | ||||
| 2208 | Collema tenax var. corallinum | (A. Massal.) Degel. (1954) | No | Enchylium tenax var. tenax | 459 | isidiate morph, but no longer recognized taxonomically | LC | |||
| 2209 | Collema tenax var. coronatum | Körb. (1865) | No | Enchylium tenax var. tenax | 459 | LC | ||||
| 2210 | Collema tenax var. tenax | (Sw.) Ach. (1810) | No | Enchylium tenax var. tenax | Collema tenax (incl. var. corallinum & var. vulgare) | 459 | LC | |||
| 2211 | Collema tenax var. vulgare | (Schaer.) Degel. (1954) | No | Enchylium tenax var. tenax | 459 | no longer a recognized variety | LC | |||
| 2212 | Collema tenuissimum | (Dicks.) Hoffm. (1796) | No | Scytinium tenuissimum | 847 | LC NS | ||||
| 2213 | Collema terrulentum | Nyl. | No | Scytinium fragrans | 448 | EN A, C NR P Sc Wa IR | ||||
| 2214 | Collema trachyopum | Taylor | No | ? Placynthium nigrum | ||||||
| 2215 | Collema tremelloides | auct. brit. p.p. | No | Leptogium britannicum | 829 | LC NS Sc IR | ||||
| 2216 | Collema tremelloides | auct. brit. p.p. | No | Leptogium cochleatum | 832 | VU C2, D1 NS P Eng Sc WaL IR | ||||
| 2217 | Collema tunaeforme | (Ach.) Ach. (1810) [orth. var.] | No | Lathagrium fuscovirens | 463 | LC | ||||
| 2218 | Collema tuniforme | (Ach.) Ach. (1810) | No | Lathagrium fuscovirens | 463 | LC | ||||
| 2219 | Collema undulatum var. granulosum | Degel. (1954) | No | Lathagrium undulatum var. granulosum | 465 | DD NR | ||||
| 2220 | Collema undulatum var. undulatum | Laurer ex Flot. (1850) | No | Lathagrium undulatum var. undulatum | 464 | DD NR |