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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 4261 | Lecidea morio | auct. brit. | No | Sporostatia ?testudinea | ||||||
| 4262 | Lecidea mucosa | Stirt. (1879) | Yes | Lecidea mucosa | 1966 | DD NR E Sc IR | Lecidea mucosa | |||
| 4263 | Lecidea muddii | Salwey ex Mudd, nom. inval. | No | Halecania ralfsii | 620 | LC NS | ||||
| 4264 | Lecidea mullensis | Stirt. (1878) | No | Lambiella mullensis | 752 | LC NS E IR | ||||
| 4265 | Lecidea multifera | J.A. Martind. (1889) | No | Spirographa fusisporella | 2218 | LC NS | LF | |||
| 4266 | Lecidea muscorum | Ach. (1803) | No | Toniniopsis bagliettoana | 158 | LC | ||||
| 4267 | Lecidea mutabilis | auct. brit., non Fée | No | Japewiella tavaresiana | 708 | LC | ||||
| 4268 | Lecidea myriocarpa | (DC.) Röhl. | No | Amandinea punctata | 212 | LC | ||||
| 4269 | Lecidea myriocarpa f. areolata | Leight. | No | Amandinea | Amandinea ? punctata | |||||
| 4270 | Lecidea myriocarpa f. ecrustacea | Leight. | No | Amandinea | Amandinea ? punctata | |||||
| 4271 | Lecidea myriocarpa f. leprosa | Leight. | No | Amandinea | Amandinea ? punctata | |||||
| 4272 | Lecidea myriocarpa f. opegraphina | Leight. | No | Amandinea | Amandinea ? punctata | |||||
| 4273 | Lecidea neglecta | Nyl. | No | Lepraria neglecta | 822 | LC NS | ||||
| 4274 | Lecidea neglecta | auct. p.p. | No | Rhymbocarpus neglectus | 2106 | NE NR | LF | |||
| 4275 | Lecidea nigrificans | Nyl. | No | Halecania spodomela | 622 | LC NR Sc | ||||
| 4276 | Lecidea nigroclavata | Nyl. | No | Catillaria nigroclavata | 316 | LC NS | ||||
| 4277 | Lecidea nigrocruenta | Anzi | No | Porpidia macrocarpa f. nigrocruenta | 2399 | LC NR | ||||
| 4278 | Lecidea nigroglomerata | Leight. ex Cromb. | No | Lecanora formosa | 795 | NT NR Sc | ||||
| 4279 | Lecidea nigrogrisea | Nyl. | No | Lecidea siderolithica | 753 | DD NR | ||||
| 4280 | Lecidea nigroleprosa | (Vain.) H. Magn. | No | Miriquidica nigroleprosa var. nigroleprosa | 1627 | LC NS | ||||
| 4281 | Lecidea nitescens | Leight. | No | ? Porpidia platycarpoides | ||||||
| 4282 | Lecidea nitida | sensu Leight. | No | Clauzadeana macula | 746 | LC NS | ||||
| 4283 | Lecidea nylanderi | (Anzi) Th. Fr. (1874) | Yes | Lecidea nylanderi | 1710 | LC NS | Lecidea nylanderi | |||
| 4284 | Lecidea obluridata | Nyl. (1873) | Yes | Lecidea obluridata | 2312 | DD NR | Lecidea obluridata | |||
| 4285 | Lecidea obsoleta | Nyl. (1865) | No | Watsoniomyces obsoletus | 740 | LC NS ?E IR | ||||
| 4286 | Lecidea obtegens | (Th. Fr.) Lettau (1958) | No | Trapelia obtegens | 1434 | LC | ||||
| 4287 | Lecidea obturbans | Nyl. (1886) | No | Tylothallia biformigera | 1440 | LC | ||||
| 4288 | Lecidea occellata | (Flot.) Flörke ex Flot. [orth. error] | No | Buellia ocellata | 219 | LC | ||||
| 4289 | Lecidea ocellata | (Flot.) Flörke ex Flot. | No | Buellia ocellata | 219 | LC | ||||
| 4290 | Lecidea ocellata subsp. praeponens | Nyl. | No | Buellia ocellata | 219 | LC |