Checklist of lichens of Massachusetts (USA) Version 31 December 2018

 

1. Absconditella trivialis (Tuck.) Vezda - Tuckerman (1882: 220 as Gyalecta geoica f. trivialis Type), Vezda (1965: 241)

2. Acarospora fuscata (Schrad.) Arnold - LaGreca et al. (2005: 79)
   
3. Acarospora moenium (Vain.) Räsänen - LaGreca et al. (2005: 80 as Aspicilia moenium)

4. Amandinea milliaria (Tuck.) P. May & Sheard - LaGreca et al. (2005: 79)
   
5. Amandinea polyspora (Willey in Tuck.) E. Lay & P. May - Tuckerman (1888: 97 Type in Washington, USA US), Sheard & May (1997: 164), Thomson (1997: 137 as Buellia polyspora), LaGreca et al. (2005: 79)
   
6. Amandinea punctata (Hoffm.) Coppins & Scheid. - Thomson (1997: 138 as Buellia punctata), LaGreca et al. (2005: 79)
   
7. Amandinea turgescens (Nyl.) Marbach - Nylander (1872: 187 Type in Uppsala, Sweden UPS), Marbach (2000: 109)

8. Arthonia lapidicola (Taylor) Branth & Rostrup - LaGreca et al. (2005: 79)
   
9. Arthonia susa R. C. Harris & Lendemer - Harris & Lendemer (2013: 19 Type in New York, USA NY)

10. Aspicilia cinerea (L.) Körb. - Thomson (1997: 68), LaGreca et al. (2005: 80)
    
11. Aspicilia verrucigera Hue - LaGreca et al. (2005: 80)

12. Athallia holocarpa (Hoffm. ex Ach.) Arup, Frödén & Søchting - LaGreca et al. (2005: 80 as Caloplaca holocarpa)
    
13. Athallia scopularis (Nyl.) Arup, Frödén & Søchting - LaGreca et al. (2005: 80 as Caloplaca scopularis)

14. Bacidia scopulicola (Nyl.) A. L. Sm. - LaGreca et al. (2005: 80)

15. Bacidina arnoldiana (Körb.) V. Wirth & Vězda - LaGreca et al. (2005: 80)
    
16. Bacidina delicata (Leight.) V. Wirth & Vězda - LaGreca et al. (2005: 80)
    
17. Bacidina egenula (Nyl.) Vězda - LaGreca et al. (2005: 80)
    
18. Bacidina inundata (Fr.) Vězda - LaGreca et al. (2005: 80)

19. Baeomyces placophyllus Ach. - Thomson (1984: 49)
    
20. Baeomyces rufus (Huds.) Rebent. - Thomson (1984: 52)

21. Blastenia ferruginea (Huds.) A. Massal. - LaGreca et al. (2005: 80 as Caloplaca ferruginea)

22. Bryoria fuscescens (Gyeln.) Brodo & D. Hawksw. - Thomson (1984: 57)
    
23. Bryoria salazinica Brodo & D. Hawksw. - Brodo & Hawksworth (xx: xx Type)

24. Buellia badia (Fr.) A. Massal. - Tuckerman (1872: 185 sub Buellia turgescens), Marbach (2000: 109)

25. Caeruleum immersum (Fink) K. Knudsen & B. Abbott - LaGreca et al. (2005: 79 as Acarospora immersa)

26. Caloplaca cerina (Ehrh. ex Hedw.) Th. Fr. - Thomson (1997: 154)
    
27. Caloplaca chlorina (Flot.) H. Olivier - LaGreca et al. (2005: 80)
    
28. Caloplaca saxicola (Hoffm.) Nordin - Thomson (1997: 169)

29. Candelaria concolor (Dicks.) Arnold - LaGreca et al. (2005: 80)

30. Candelariella aurella (Hoffm.) Zahlbr. - LaGreca et al. (2005: 80)
    
31. Candelariella efflorescens R. C. Harris & W. R. Buck - Thomson (1997: 185), LaGreca et al. (2005: 80)
    
32. Candelariella vitellina (Hoffm.) Müll. Arg. - Thomson (1997: 189), LaGreca et al. (2005: 80)

33. Catillaria glauconigrans (Tuck.) Hasse - Thomson (1997: 197)

34. Cetraria arenaria Kärnefelt - LaGreca et al. (2005: 81)
    
35. Cetraria ericetorum Opiz subsp. ericetorum - Howe (1918: 40 as Cetraria tenuifolia), Thomson (1984: 79)

36. Chaenotheca chrysocephala (Ach.) Th. Fr. - Willey (1892: 35 as Coniocybe gracilescens Type in US), Selva (2004: 20 as Coniocybe gracilescens)

37. Chrysothrix caesia (Flot.) Ertz & Tehler - LaGreca et al. (2005: 79 as Arthonia caesia)

38. Circinaria caesiocinerea (Nyl. ex Malbr.) A. Nordin, Savic & Tibell - LaGreca et al. (2005: 79 as Aspicilia caesiocinerea)

39. Cladonia apodocarpa Robbins - Robbins (1926: 211 Protologue), Ahti (1993: 67 Lectotypification), LaGreca et al. (2005: 81) Type in FH
    
40. Cladonia arbuscula (Wallr.) Rabenh. subsp. arbuscula - Howe (1912: 89 as Cladonia sylvatica), Thomson (1984: 110), LaGreca et al. (2005: 81 as Cladina arbuscula)
    
41. Cladonia bacillaris (Ach.) Nyl. - Thomson (1984: 111), LaGreca et al. (2005: 81)
    
42. Cladonia boryi Tuck. - Tuckerman (1848: 246 Protologue), Howe (1912: 89 as Cladonia reticulata), Ahti (1983: xx Lectotypification), Ahti (1993: 69), LaGreca et al. (2005: 81) Type in FH-Tuck
    
43. Cladonia cariosa (Ach.) Spreng. - Thomson (1984: 116)
    
44. Cladonia chlorophaea ( Flörke ex. Sommerf.) Spreng. - Thomson (1984: 119), LaGreca et al. (2005: 81)
    
45. Cladonia coniocraea (Flörke) Spreng. - Thomson (1984: 122), LaGreca et al. (2005: 81)
    
46. Cladonia cornuta (L.) Hoffm. - LaGreca et al. (2005: 81)
    
47. Cladonia cristatella Tuck. - Howe (1913: 93), LaGreca et al. (2005: 81)
    
48. Cladonia cryptochlorophaea Asah. - Thomson (1984: 126)
    
49. Cladonia cylindrica (A. Evans) A. Evans - LaGreca et al. (2005: 81)
    
50. Cladonia digitata (L.) Hoffm. - Thomson (1984: 131)
    
51. Cladonia farinacea (Vain.) A. Evans - LaGreca et al. (2005: 81)
    
52. Cladonia fimbriata (L.) Fr. - LaGreca et al. (2005: 81)
    
53. Cladonia furcata (Huds.) Schrad. - LaGreca et al. (2005: 81)
    
54. Cladonia gracilis (L.) Willd. var. turbinata (Ach.) Ahti - LaGreca et al. (2005: 81)
    
55. Cladonia grayi G. Merr. ex Sandst. - Thomson (1984: 139), LaGreca et al. (2005: 81)
    
56. Cladonia humilis (With.) J. R. Laundon - LaGreca et al. (2005: 81)
    
57. Cladonia macilenta Hoffm. - LaGreca et al. (2005: 81)
    
58. Cladonia mateocyatha Robbins - Robbins (1925: 50 Type in FH), Athi (1993: 84 Lectotypification)
    
59. Cladonia mitis Sandst. - Thomson (1984: 148), LaGreca et al. (2005: 81 as Cladina mitis)
    
60. Cladonia multiformis G. Merr. - LaGreca et al. (2005: 82)
    
61. Cladonia ochrochlora Flörke - LaGreca et al. (2005: 82)
    
62. Cladonia petrophila R. C. Harris - Harris (1992: 329 First record)
    
63. Cladonia peziziformis (With.) J. R. Laundon - LaGreca et al. (2005: 82)
    
64. Cladonia pleurota (Flörke) Schaer. - Thomson (1984: 154), LaGreca et al. (2005: 82)
    
65. Cladonia pyxidata (L.) Hoffm. - Thomson (1984: 158), LaGreca et al. (2005: 82)
    
66. Cladonia ramulosa (With.) J. R. Laundon - LaGreca et al. (2005: 82)
    
67. Cladonia rangiferina (L.) F. H. Wigg. - Howe (1912: 89), Thomson (1984: 159)
    
68. Cladonia rei Schaer. - LaGreca et al. (2005: 82)
    
69. Cladonia simulata Robbins - Robbins (1929: 105 Type in FH), Ahti (1993: 94 Lectotypification)
    
70. Cladonia squamosa (Scop.) Hoffm. - Howe (1913: 93), Thomson (1984: 161), LaGreca et al. (2005: 82)
    
71. Cladonia stellaris (Opiz) Pouzar & Vezda - Thomson (1984: 163)
    
72. Cladonia strepsilis (Ach.) Grogn. - LaGreca et al. (2005: 82)
    
73. Cladonia subcariosa Nyl. - LaGreca et al. (2005: 82 as Cladonia polycarpia), LaGreca et al. (2005: 82 as Cladonia polycarpoides), LaGreca et al. (2005: 82 as Cladonia sobolescens)
    
74. Cladonia submitis A. Evans - Evans (1943: 435 Type in Washington, USA US), Ahti (1993: 97), LaGreca et al. (2005: 81 as Cladina submitis)
    
75. Cladonia subtenuis (Abbayes) Mattick - LaGreca et al. (2005: 81 as Cladina subtenuis)
    
76. Cladonia turgida Ehrh. ex Hoffm. - Thomson (1984: 172)
    
77. Cladonia uncialis (L.) Weber ex F. H. Wigg. - Howe (1913: 94), Thomson (1984: 173), LaGreca et al. (2005: 82)
    
78. Cladonia verticillata (Hoffm.) Schaer. - Howe (1912: 89), Howe (1913: 94), Thomson (1984: 174), LaGreca et al. (2005: 81 as Cladonia cervicornis subsp. verticillata)

79. Collema flaccidum (Ach.) Ach. - Thomson (1984: 186)
    
80. Collema leptaleum Tuck. - Nelson et al. (2011: 3)

81. Collemopsidium halodytes (Nyl.) Grube & B. D. Ryan - LaGreca et al. (2005: 82)
    
82. Collemopsidium sublitoralis (Leight.) Arnold - Thomson (1997: 49 as Arthopyrenia sublitoralis)

83. Cryptothele permiscens (Nyl.) Th. Fr. - Tuckerman (1872: 80 as Synalissa phylliscina Type in FH), Henssen & Jørgensen (1990: 139)

84. Calicium tigillare (Ach.) Pers. - Thomson (1997: 214 as Cyphelium tigillare)

85. Dermatocarpon luridum (With.) J. R. Laundon - LaGreca et al. (2005: 82)
    
86. Dermatocarpon miniatum (L.) W. Mann - Thomson (1984: 219)
    
87. Dermatocarpon tenue (Müll. Arg.) Heiðmarsson - Heiðmarsson (2003: 467)

88. Dibaeis baeomyces (L. f.) Rambold & Hertel - Thomson (1984: 51 as Baeomyces roseus)

89. Dimelaena oreina (Ach.) Norman - LaGreca et al. (2005: 82)

90. Diploschistes badius Lumbsch & Elix - Martin et al. (2003: 28)
    
91. Diploschistes muscorum (Scop.) R. Sant. subsp. muscorum - LaGreca et al. (2005: 82)

92. Diplotomma alboatrum (Hoffm.) Flot. - Thomson (1997: 127 as Buellia alboatra), LaGreca et al. (2005: 82)

93. Endocarpon pusillum Hedwig - LaGreca et al. (2005: 82)

94. Evernia mesomorpha Nyl. - Thomson (1984: 229), LaGreca et al. (2005: 82)

95. Flavoparmelia baltimorensis (Gyeln. & Fóriss) Hale - LaGreca et al. (2005: 82)
    
96. Flavoparmelia caperata (L.) Hale - Howe (1912: 89 as Parmelia caperata), LaGreca et al. (2005: 82)

97. Flavoplaca citrina (Hoffm.) Arup, Frödén & Søchting - LaGreca et al. (2005: 80 as Caloplaca citrina)

98. Fuscidea arboricola Coppins & Tønsberg - LaGreca et al. (2005: 82)

99. Gyalolechia flavovirescens (Wulfen) Dalla Torre & Sarnth. - LaGreca et al. (2005: 80 as Caloplaca flavovirescens)
    
100. Gyalolechia xanthostigmoidea (Räsänen) Søchting, Frödén & Arup - Thomson (1997: 158 as Caloplaca discolor)

101. Hydropunctaria maura (Wahlenb.) Keller, Gueidan & Thüs - LaGreca et al. (2005: 87 as Verrucaria maura)

102. Hyperphyscia adglutinata (Flörke) H. Mayrh. & Poelt - LaGreca et al. (2005: 83)

103. Hypocenomyce scalaris (Ach.) M. Choisy - LaGreca et al. (2005: 83)

104. Hypogymnia physodes (L.) Nyl. - Thomson (1984: 241), LaGreca et al. (2005: 83)

105. Imshaugia aleurites (Ach.) S. F. Meyer - Howe (1918: 40 as Parmeliopsis aleurites), Thomson (1984: 321 as Parmeliopsis aleurites)

106. Lassalia papulosa (Ach.) Llano - Thomson (1984: 245), LaGreca et al. (2005: 83)
     
107. Lasallia pensylvanica (Hoffm.) Llano - Thomson (1984: 246)

108. Lecanora albescens (Hoffm.) Branth & Rostrup - LaGreca et al. (2005: 83)
     
109. Lecanora allophana (Ach.) Nyl. - Howe (1913: 94 as Lecanora subfusca)
     
110. Lecanora argentea Brodo - Thomson (1997: 281 as Lecanora fuliginosa)
     
111. Lecanora cenisia Ach. - Thomson (1997: 272)
     
112. Lecanora chlarotera Nyl. - Thomson (1997: 273)
     
113. Lecanora congesta Lynge - LaGreca et al. (2005: 83)
     
114. Lecanora contractula Nyl. - LaGreca et al. (2005: 83)
     
115. Lecanora dispersa (Pers.) Sommerf. - LaGreca et al. (2005: 83)
     
116. Lecanora hagenii (Ach.) Ach. - LaGreca et al. (2005: 83)
     
117. Lecanora helicopis (Wahlenb.) Ach. - LaGreca et al. (2005: 83)
     
118. Lecanora hybocarpa (Tuck.) Brodo - LaGreca et al. (2005: 83)
     
119. Lecanora minutella Nyl. - LaGreca et al. (2005: 83)
     
120. Lecanora muralis (Schreb.) Rabenh. - Thomson (1997: 295), LaGreca et al. (2005: 83)
     
121. Lecanora polytropa (Ehrh. ex Hoffm.) Rabenh. - LaGreca et al. (2005: 83)
     
122. Lecanora pulicaris (Pers.) Ach. - Thomson (1997: 301), LaGreca et al. (2005: 83)
     
123. Lecanora saligna (Schrad.) Zahlbr. - LaGreca et al. (2005: 83)
     
124. Lecanora strobilina (Sprengel) Kieffer - LaGreca et al. (2005: 83)
     
125. Lecanora subpallens Zahlbr. - LaGreca et al. (2005: 83 as Lecanora caesiorubella subsp. prolifera)
     
126. Lecanora symmicta (Ach.) Ach. - LaGreca et al. (2005: 83)
     
127. Lecanora varia (Hoffm.) Ach. - Howe (1918: 40), Thomson (1997: 311)
     
128. Lecanora xylophila Hue - Thomson (1997: 284 as Lecanora grantii), LaGreca et al. (2005: 83)

129. Lecidea cyrtidia Tuck. - LaGreca et al. (2005: 84)
     
130. Lecidea nylanderi (Anzi) Th. Fr. - Thomson (1997: 365)
     
131. Lecidea tessellata Flörke - LaGreca et al. (2005: 84)
     
132. Lecidea varians Ach. - LaGreca et al. (2005: 85 as Pyrrhospora varians)

133. Leimonis erratica (Körb.) R. C. Harris & Lendemer - LaGreca et al. (2005: 84 as Micarea erratica)

134. Lepraria finkii (B. de Lesd.) R. C. Harris - LaGreca et al. (2005: 84 erroneously as Lepraria lobificans)
     
135. Lepraria neglecta (Nyl.) Erichsen - LaGreca et al. (2005: 84 as Lepraria caesioalba), LaGreca et al. (2005: 84)

136. Leptogium arcticum Jörg. - Thomson (1984: 255)
     
137. Leptogium byssinum (Hoffm.) Zwackh ex Nyl. - Thomson (1984: 256)
     
138. Leptogium saturninum (Dicks.) Nyl. - Thomson (1984: 262)

139. Evernia mesomorpha Nyl. - Howe (1912: 89 as Letharia thamnodes)

140. Lichina willeyi (Tuck.) Henssen - Tuckerman (1882: 133 as Lichina confinis *willeyi Type in FH), Henssen (1969: 91)

141. Lobaria pulmonaria (L.) Hoffm. - Howe (1912: 90 as Sticta pulmonaria)
     
142. Lobaria scrobiculata (Scop.) DC. - Thomson (1984: 271)

143. Melanelixia subaurifera (Nyl.) O. Blanco et al. - Thomson (1984: 316 as Parmelia subaurifera), LaGreca et al. (2005: 84)

144. Micarea neostipitata Coppins & P. May - Coppins & May (2001: 487 Type in FH)
     
145. Micarea rhabdogena (Norm.) Hedl. - Tuckerman (1888: 23 as Biatora punctella Type in US), , Printzen (1995: 212 Lectotypification of Biatora punctella)

146. Montanelia sorediata (Ach.) Divakar, A. Crespo, Wedin & Essl. - Thomson (1984: 312 as Parmelia sorediosa)

147. Mycobilimbia berengeriana (A. Massal.) Hafellner & V. Wirth - Thomson (1997: 331 as Lecidea berengeriana)

148. Mycoblastus sanguinarius (L.) Norman - LaGreca et al. (2005: 84)

149. Mycoporum lacteum xx - Minks (xx: xx as Mycoporum difforme Type), Harris (1995: 65)

150. Myriospora smaragdula (Wahlenb. in Ach.) K. Knudsen & B. Abbott - Thomson (1997: 34 as Acarospora smaragdula), LaGreca et al. (2005: 79 as Acarospora smaragdula), Knudsen (2007: 95 as Acarospora smaragdula)

151. Nephroma bellum (Spreng.) Tuck. - Thomson (1984: 278)
     
152. Nephroma helveticum Ach. subsp. helveticum - Thomson (1984: 280 as Nephroma helveticum var. helveticum)
     
153. Nephroma parile (Ach.) Ach. - Thomson (1984: 282)
     
154. Nephroma resupinatum (L.) Ach. - Thomson (1984: 283)

155. Parmelia mayi Divakar, A. Crespo & M.C. Molina - xx (2011: 340 Type in Madrid, Spain MAF)
     
156. Parmelia saxatilis (L.) Ach. - Thomson (1984: 310)
     
157. Parmelia squarrosa Hale - LaGreca et al. (2005: 84)
     
158. Parmelia sulcata Tayl. - Howe (1913: 94 as Parmelia saxatilis var. sulcata), Thomson (1984: 318), LaGreca et al. (2005: 84)

159. Parmeliopsis hyperopta (Ach.) Arnold - LaGreca et al. (2005: 84)

160. Parmotrema hypotropum (Nyl.) Hale - Howe (1912: 89 as Parmelia perforata var. hypotropa)
     
161. Parmotrema perlatum (Huds.) M. Choisy - Howe (1912: 89 as Parmelia perlata)

162. Peltigera aphthosa (L.) Willd. - Thomson (1984: 329)
     
163. Peltigera didactyla (With.) J. R. Laundon - Thomson (1984: 332 as Peltigera canina f. sorediata), LaGreca et al. (2005: 84)
     
164. Peltigera leucophlebia (Nyl.) Gyeln. - Thomson (1984: 330 sub Peltigera aphthosa var. leucophlebia)
     
165. Peltigera rufescens (Weis.) Humb. - Thomson (1984: 333 as Peltigera canina var. rufescens)
     
166. Peltigera horizontalis (Huds.) Baumg. - Thomson (1984: 337)
     
167. Peltigera polydactylon (Neck.) Hoffm. - Thomson (1984: 343)
     
168. Peltigera venosa (L.) Baumg. - Thomson (1984: 345)

169. Pertusaria carneopallida (Nyl.) Anzi ex Nyl. - Thomson (1997: 451)
     
170. Pertusaria macounii (I. M. Lamb) Dibben - LaGreca et al. (2005: 84)
     
171. Pertusaria sommerfeltii (Flörke ex Sommerf.) Fr. - Thomson (1997: 461)
     
172. Pertusaria xanthodes Müll. Arg. - LaGreca et al. (2005: 84)

173. Phaeophyscia adiastola (Essl.) Essl. - LaGreca et al. (2005: 84)
     
174. Phaeophyscia orbicularis (Necker) Moberg - LaGreca et al. (2005: 84)
     
175. Phaeophyscia pusilloides (Zahlbr.) Essl. - LaGreca et al. (2005: 84)
     
176. Phaeophyscia rubropulchra (Degel.) Essl. - LaGreca et al. (2005: 84)

177. Phlyctis argena (Sprengel) Flot. - LaGreca et al. (2005: 84)

178. Phylliscum demangeonii (Moug. & Mont. in Mont.) Nyl. - Thomson (1997: 469)

179. Physcia adscendens (Fr.) H. Oliv. - Thomson (1984: 352), LaGreca et al. (2005: 84)
     
180. Physcia aipolia (Humb.) Fürnr. var. aipolia - Thomson (1984: 353), LaGreca et al. (2005: 85)
     
181. Physcia caesia (Hoffm.) Fürnr. - Thomson (1984: 354)
     
182. Physcia tenella (Schreb.) Tuck. - Howe (1912: 90 erroneously as Physcia hispida)
     
183. Physcia millegrana Degel. - LaGreca et al. (2005: 85)
     
184. Physcia phaea (Tuck.) J. W. Thomson - Thomson (1984: 356)
     
185. Physcia stellaris (L.) Nyl. - Howe (1918: 40), LaGreca et al. (2005: 85)
     
186. Physcia subtilis Degel. - LaGreca et al. (2005: 85)
     
187. Physcia tribacia (Ach.) Tuck. - Howe (1912: 90)

188. Physciella chloantha (Ach.) Essl. - LaGreca et al. (2005: 85)
     
189. Physciella melanchra (Hue) Essl. - LaGreca et al. (2005: 85)

190. Physconia detersa (Nyl.) Poelt - Thomson (1984: 359)

191. Placynthiella icmalea (Ach.) Coppins & P. James - LaGreca et al. (2005: 85)
     
192. Placynthiella uliginosa (Schrad.) Coppins & James - Thomson (1997: 475), LaGreca et al. (2005: 85)

193. Plastimatia glauca (L.) W. L. Culb. & C. F. Culb. - Thomson (1984: 368)

194. Polycauliona candelaria (L.) Frödén, Arup, & Søchting - Thomson (1984: 483 as Xanthoria candelaria)
     
195. Polycauliona polycarpa (Hoffm.) Frödén, Arup, & Søchting - Thomson (1984: 487 as Xanthoria polycarpa)
     
196. Polycauliona verruculifera (Vain.) Zahlbr. - LaGreca et al. (2005: 80 as Caloplaca verruculifera)

197. Polysporina simplex (Taylor) Vezda - LaGreca et al. (2005: 85)

198. Porocyphus coccodes (Flot.) Körb. - Thomson (1997: 488)

199. Porpidia albocaerulescens (Wulfen) Hertel & Knoph - LaGreca et al. (2005: 85)
     
200. Porpidia crustulata (Ach.) Hertel & Knoph - LaGreca et al. (2005: 85)

201. Protopannaria pezizoides (Weber) P. M. Jørg. & S. Ekman - Thomson (1984: 294 as Pannaria pezizoides)

202. Psilolechia lucida (Ach.) M. Choisy - LaGreca et al. (2005: 85)

203. Punctelia rudecta (Ach.) Krog - Howe (1912: 89 as Parmelia borreri var. rudecta), LaGreca et al. (2005: 85)

204. Pycnothelia papillaria (Ehrh.) Duf. - Thomson (1984: 369)

205. Ramalina americana Hale - LaGreca et al. (2005: 85)
     
206. Ramalina dilacerata (Hoffm.) Vain. - Howe (1912: 89)
     
207. Ramalina farinacea (L.) Ach. - Howe (1913: 93)
     
208. Ramalina fastigiata (Pers.) Ach. - Howe (1918: 40)
     
209. Ramalina intermedia (Delise ex Nyl.) Nyl. - Thomson (1984: 379)
     
210. Ramalina rigida Pers. ex Ach. - Howe (1912: 89)

211. Rhizocarpon distinctum Th. Fr. - LaGreca et al. (2005: 85)
     
212. Rhizocarpon grande (Flörke ex Flot.) Arnold - Thomson (1997: 539), LaGreca et al. (2005: 85)
     
213. Rhizocarpon obscuratum (Ach.) A. Massal. - Thomson (1997: 545), LaGreca et al. (2005: 85 as Rhizocarpon reductum)
     
214. Rhizocarpon rubescens Th. Fr. - LaGreca et al. (2005: 85)

215. Rhizoplaca chrysoleuca (Sm.) Zopf - Thomson (1997: 554)
     
216. Rhizoplaca subdiscrepans (Nyl.) R. Sant. - LaGreca et al. (2005: 85)

217. Rimularia badioatra (Kremp.) Hertel & Rambold - LaGreca et al. (2005: 85)

218. Rinodina confragosa (Ach.) Körb. - LaGreca et al. (2005: 86)
     
219. Rinodina gennarii Bagl. - LaGreca et al. (2005: 86)
     
220. Rinodina subminuta H. Magn. - LaGreca et al. (2005: 86)
     
221. Rinodina willeyi Sheard & Giralt - Sheard (1995: 124 Type in Washington, USA US), Sheard (2010: 207)

222. Ropalospora chlorantha (Tuck.) S. Ekman - HBG
     
223. Ropalospora viridis (Tønsberg) Tønsberg - LaGreca et al. (2005: 86)

224. Rusavskia elegans (Link.) S. Y. Kondr. & Kärnefelt - Thomson (1984: 484 as Xanthoria elegans), LaGreca et al. (2005: 87 as Xanthoria elegans)

225. Sarcogyne hypophaea (Nyl.) Arnold - Thomson (1997: 578 as Sarcogyne privigna auct.)
     
226. Sarcogyne regularis Körb. - LaGreca et al. (2005: 86)
     
227. Sarcogyne similis H. Magn. - Poelt & Vezda (1974: 52)

228. Sarcosagium campestre (Fr.) Poetsch & Schiedem. - Thomson (1997: 119 as Biatorella campestris)

229. Scoliciosporum chlorococcum (Stenh.) Vezda - LaGreca et al. (2005: 86)
     
230. Scoliciosporum umbrinum (Ach.) Arnold - LaGreca et al. (2005: 86)

231. Scytinium lichenoides (L.) Otálora, P. M. Jørg. & Wedin - Thomson (1984: 257 as Leptogium lichenoides)
     
232. Scytinium tenuissimum (Dicks.) Otálora, P. M. Jørg. & Wedin - Thomson (1984: 264 as Leptogium tenuissimum), LaGreca et al. (2005: 84 as Leptogium tenuissimum)

233. Staurothele fissa (Tayler) Zwackh - Thomson (1997: 596)

234. Stereocaulon condensatum Hoffm. - Thomson (1984: 407)
     
235. Stereocaulon saxatile H. Magn. - LaGreca et al. (2005: 86)
     
236. Stereocaulon tomentosum E. Fries - Thomson (1984: 428)
     
237. Stereocaulon vesuvianum Pers. - Thomson (1984: 430)

238. Strangospora moriformis (Ach.) Stein - Thomson (1997: 599)

239. Teloschistes chrysophthalmus (L.) Norm. - Howe (1912: 89)
     
240. Teloschistes flavicans (Sw.) Norm. - Howe (1913: 93)

241. Thelocarpon laureri (Flot.) Nyl. - LaGreca et al. (2005: 86)

242. Trapelia glebulosa (Sm.) J. R. Laundon - LaGreca et al. (2005: 86 as Trapelia involuta)
     
243. Trapelia placodioides Coppins & P. James - LaGreca et al. (2005: 86)

244. Trapeliopsis flexuosa (Fr.) Coppins & P. James - Thomson (1997: 622), LaGreca et al. (2005: 86)
     
245. Trapeliopsis granulosa (Hoffm.) Lumbsch - Thomson (1997: 624), LaGreca et al. (2005: 86)

246. Tuckermannopsis ciliaris (Ach.) Gyeln. - Howe (1918: 40 as Nephromopsis ciliaris)

247. Umbilicaria mammulata (Ach.) Tuck. - LaGreca et al. (2005: 86)
     
248. Umbilicaria muehlenbergii (Ach.) Tuck. - Thomson (1984: 26 as Actinogyra muehlenbergii), LaGreca et al. (2005: 86)

249. Usnea cavernosa Tuck. - Thomson (1984: 463)
     
250. Usnea filipendula Stirt. - Thomson (1984: 465 as Usnea dasypoga)
     
251. Usnea florida (L.) Weber ex F. H. Wigg. - Howe (1912: 89)
     
252. Usnea hirta (L.) Weber ex F. H. Wigg. - Thomson (1984: 467)
     
253. Usnea subfloridana Stirt. - Thomson (1984: 469)

254. Verrucaria calkinsiana Servít - LaGreca et al. (2005: 86)
     
255. Verrucaria degelii R. Sant. - LaGreca et al. (2005: 86)
     
256. Verrucaria ditmarsica Erichsen - LaGreca et al. (2005: 86)
     
257. Verrucaria erichsenii Zschacke - Thomson (1997: 637), LaGreca et al. (2005: 86)
     
258. Verrucaria glaucovirens Grummann - LaGreca et al. (2005: 87)
     
259. Verrucaria muralis Ach. - LaGreca et al. (2005: 87)
     
260. Verrucaria nigrescens Pers. - Thomson (1997: 642), LaGreca et al. (2005: 87)
     
261. Verrucaria nigrescentoidea Fink ex J. Hedrick - LaGreca et al. (2005: 87)
     
262. Verrucaria silicicola Fink in Hedr. - LaGreca et al. (2005: 87)

263. Wahlenbergiella mucosa (Wahlenb.) Gueidan & Thüs - Thomson (1997: 641 as Verrucaria mucosa), LaGreca et al. (2005: 87 as Verrucaria mucosa)
     
264. Wahlenbergiella striatula (Wahlenb.) Gueidan & Thüs - Thomson (1997: 645 as Verrucaria striatula), LaGreca et al. (2005: 87 erroneouly as Verrucaria microspora), LaGreca et al. (2005: 87 as Verrucaria striatula)

265. Xanthocarpia feracissima (H. Magn.) Frödén, Arup & Søchting - LaGreca et al. (2005: 80 as Caloplaca feracissima)

266. Xanthomendoza fallax (Hepp ex Arnold) Søchting, Kärnefelt & S. Y. Kondr. - Thomson (1984: 486 as Xanthoria fallax)

267. Xanthoparmelia conspersa (Ehrh. ex Ach.) Hale - LaGreca et al. (2005: 87)
     
268. Xanthoparmelia cumberlandia (Gyeln.) Hale - LaGreca et al. (2005: 87)
     
269. Xanthoparmelia plittii (Gyeln.) Hale - LaGreca et al. (2005: 87)
     
270. Xanthoparmelia stenophylla (Ach.) Ahti & D. Hawksw. - LaGreca et al. (2005: 87 as Xanthoparmelia somloensis)
     
271. Xanthoparmelia viriduloumbrina (Gyeln.) Lendemer - Thomson (1984: 480 erroneously as Xanthoparmelia taractica)

272. Xanthoria parietina (L.) Th. Fr. - Howe (1912: 89 as Physcia parietina), LaGreca et al. (2005: 87)

273. Xylographa opegraphella Nyl. ex Rothr. - LaGreca et al. (2005: 87)