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 Sort ascending | Authority | Is Current Name? | Current Taxon Name | Synonyms | BLS Number | Comments | Conservation Evaluation | Group | Account & Map |
|---|---|---|---|---|---|---|---|---|---|---|
| 31 | Xylographa rubescens | Räsänen (1921) | Yes | Xylographa rubescens | 2808 | NE NR | ||||
| 32 | Xylographa parallela f. elliptica | Nyl. (1879) | No | Xylographa parallela | 1532 | LC | ||||
| 33 | Xylographa parallela f. alliptica | Nyl. ex Cromb. [orth. error] | No | Xylographa parallela | 1532 | LC | ||||
| 34 | Xylographa parallela | (Ach.) Fr. (1849) | Yes | Xylographa parallela | Xylographa abietina | 1532 | LC | Xylographa parallela | ||
| 35 | Xylographa minutula | Körb. | No | ? Xylographa parallela | ||||||
| 36 | Xylographa laricicola | Nyl. | No | Xylographa parallela | 1532 | LC | ||||
| 37 | Xylographa corrugans | Norman | No | Xylographa vitiligo | 1534 | LC | ||||
| 38 | Xylographa andrewii | (Stirt.) Reding. (1938) | No | Geltingia associata | 1943 | LC NS | LF | |||
| 39 | Xylographa abietina | (Pers.) Zahlbr. | No | Xylographa parallela | 1532 | LC | ||||
| 40 | Xerotrema quercicola | Coppins & Aptroot (2008) | Yes | Xerotrema quercicola | 2518 | NT NR E IR | F | Xerotrema quercicola | ||
| 41 | Xerotrema megalospora | Sherwood & Coppins (1980) | Yes | Xerotrema megalospora | 1960 | NT NR Sc IR | F | Xerotrema megalospora | ||
| 42 | Xenonectriella subimperspicua | (Speg.) Etayo (2017) | Yes | Xenonectriella subimperspicua | Pronectria subimperspicua | 2753 | on Parmelia & Punctelia spp. | NE NR | LF | |
| 43 | Xenonectriella streimannii | (S.Y. Kondr., Coppins & D.J. Galloway) Rossman (1999) | Yes | Xenonectriella streimannii | Pronectria streimannii | 2367 | NE NR | LF | Xenonectriella streimannii | |
| 44 | Xenonectriella septemseptata | (Etayo) Etayo & van den Boom (2014) | Yes | Xenonectriella septemseptata | Pronectria septemseptata | 2765 | on Melanelixia subaurifera | NE NR | LF | |
| 45 | Xenonectriella physciacearum | F. Berger, E. Zimm. & Brackel (2020) | Yes | Xenonectriella physciacearum | 2796 | lichenicolous on Physcia | NE NR | LF | ||
| 46 | Xenonectriella lutescens | (Arnold) Weese (1919) | Yes | Xenonectriella lutescens | 2548 | NE NR | LF | Xenonectriella lutescens | ||
| 47 | Xenonectriella leptaleoides | (Etayo) Etayo (2008) | Yes | Xenonectriella leptaleoides | Pronectria leptaleoides | 2773 | on Leptogium cyanescens | NE NR | LF | Xenonectriella leptaleoides |
| 48 | Xenonectriella leptaleae | (J. Steiner) Rossman & Lowen (1999) | No | Pronectria leptaleae | 2409 | NE NR | LF | |||
| 49 | Xenonectriella fissuriprodiens | (Etayo) Etayo (2017) | Yes | Xenonectriella fissuriprodiens | Pronectria fissuriprodiens | 2172 | on Lobaria pulmonaria | LC NS | LF | Xenonectriella fissuriprodiens |
| 50 | Xenonectriella calabrica | Brackel & Puntillo (2016) | Yes | Xenonectriella calabrica | 2807 | on Pertusaria pertusa | NE NR | LF | ||
| 51 | Xanthoriicola physciae | (Kalchbr.) D. Hawksw. (1973) | Yes | Xanthoriicola physciae | 2272 | LC | LF | Xanthoriicola physciae | ||
| 52 | Xanthoria ulophyllodes | Räsänen (1931) | Yes | Xanthoria ulophyllodes | Xanthoria candelaria auct. p.p. Xanthoria fallax auct. brit. Xanthomendoza ulophyllodes |
1909 | LC NS | Xanthoria ulophyllodes | ||
| 53 | Xanthoria ucrainica | S.Y. Kondr. (1997) | Yes | Xanthoria ucrainica | Massjukiella ucrainica; Polycauliona ucrainica; Xanthoria candelaria auct. p.p. | 950 | considered by some to be broad-lobed morph of X. candelaria | LC NS | Xanthoria ucrainica | |
| 54 | Xanthoria polycarpa f. lobulata | auct. brit. | No | Xanthoria polycarpa | 1531 | LC | ||||
| 55 | Xanthoria polycarpa | (Hoffm.) Th. Fr. ex Rieber (1891) | Yes | Xanthoria polycarpa | Massjukiella polycarpa; Polycauliona polycarpa | 1531 | LC | Xanthoria polycarpa | ||
| 56 | Xanthoria parietina var. ectanea | auct. | No | Xanthoria aureola | 1538 | LC | ||||
| 57 | Xanthoria parietina var. aureola | auct. | No | Xanthoria calcicola | 1526 | LC | ||||
| 58 | Xanthoria parietina | (L.) Th. Fr. (1860) | Yes | Xanthoria parietina | 1530 | LC | Xanthoria parietina | |||
| 59 | Xanthoria lychnea | (Ach.) Th. Fr. | No | Xanthoria candelaria s. lat. | 1527 | LC | ||||
| 60 | Xanthoria lychnea | auct. p.p. | No | Xanthoria fulva | 1918 | DD NR |