Checklist of lichens of North Dakota (USA)
Version 31 December 2018
- Acarospora americana H. Magn. - Wetmore (1985: 243), Wetmore (1985: 243 as Acarospora cinereoalba)
- Acarospora fuscata (Schrad.) Arnold - Wetmore (1985: 243)
- Acarospora moenium (Vain.) Räsänen - Lendemer (2008: 98 as Aspicilia moenium)
- Acarospora nodulosa (Dufour) Hue var. nodulosa - Wetmore (1985: 243 as Acarospora reagens)
- Acarospora schleicheri (Ach.) A. Massal. - Wetmore (1985: 243)
- Amandinea punctata (Hoffm.) Coppins & Scheid. - Wetmore (1985: 243 as Buellia punctata), Thomson (1997: 138 as Buellia punctata)
- Arthonia lapidicola (Taylor) Branth & Rostr. - Wetmore (1985: 243)
- Arthrosporum populorum A. Massal. - Wetmore (1985: 243 as Bacidia populorum), Thomson (1997: 106 as Bacidia populorum)
- Aspicilia cinerea (L.) Körb. - Wetmore (1985: 243), Lendemer (2008: 98)
- Aspicilia reptans (Looman) Wetmore - Wetmore (1985: 243)
- Aspicilia subradians (Nyl.) Hue - Thomson (1997: 94)
- Athallia holocarpa (Hoffm.) Arup, Frödén & Søchting - Wetmore (1985: 244 as Caloplaca holocarpa), Thomson (1997: 164 as Caloplaca holocarpa)
- Bacidia circumspecta (Norrl. & Nyl.) Malme - Wetmore (1985: 243 as Bacidia bacillifera)
- Bacidia bagliettoana (A. Massal. & De Not.) Jatta - Wetmore (1985: 243)
- Bacidia herbarum (Hepp ex Stizenb.) Arnold - Thomson (1997: 103)
- Bilimbia sabuletorum (Schreb.) Arnold - Wetmore (1985: 243 as Bacidia sabuletorum), Thomson (1997: 422 as Mycobilimbia sabuletorum)
- Blastenia furfuracea (H. Magn.) Arup, Søchting & Frödén - Wetmore (2004: 289 as Caloplaca furfuracea)
- Bryoria capillaris (Ach.) Brodo & D. Hawksw. - Wetmore (1985: 243)
- Bryoria fuscescens (Gyeln.) Brodo & D. Hawksw. - Wetmore (1985: 243)
- Buellia elegans Poelt - Wetmore (1985: 243), Thomson (1997: 130)
- Buellia erubescens Arnold - Disrud & Trana (1973: 29 as Buellia stillingiana), Wetmore (1985: 243 as Buellia zahlbruckneri)
- Buellia dispersa A. Massal. - Wetmore (1985: 243 as Buellia retrovertens)
- Buellia vilis Th. Fr. - Thomson (1997: 141)
- Calicium notarisii (Tul.) M. Prieto & Wedin - Wetmore (1985: 245 as Cyphelium notarisii)
- Calogaya decipiens (Arnold) Arup, Frödén & Søchting - Wetmore (1985: 243 as Caloplaca decipiens)
- Calogaya lobulata (Flörke) Arup, Frödén & Søchting - Wetmore (1985: 244 as Caloplaca lobulata)
- Caloplaca atroalba (Tuck.) Zahlbr. - Wetmore (1985: 243)
- Caloplaca cerina (Ehrh. ex Hedwig) Th. Fr. - Disrud & Trana (1973: 29), Wetmore (1985: 243), Thomson (1997: 154), Thomson (1997: 172 as Caloplaca stillicidiorum)
- Caloplaca dakotensis Wetmore - Wetmore (1994: 823 Type in MIN)
- Caloplaca fraudans (Th. Fr.) H. Olivier - Thomson (1997: 162)
- Caloplaca microphyllina (Tuck.) Hasse - Wetmore (1985: 244)
- Caloplaca obscurella (J. Lahm) Th. Fr. - Wetmore (1985: 244 as Caloplaca sarcopisioides)
- Caloplaca pratensis Wetmore - Wetmore (2009: 382 Type in MIN)
- Caloplaca saxicola (Hoffm.) Nordin - Wetmore (1985: 244), Thomson (1997: 169)
- Caloplaca ulmorum (Fink) Fink - Wetmore (1985: 244)
- Candelaria concolor (Dicks.) Arnold - Disrud & Trana (1973: 29), Wetmore (1985: 244)
- Candelariella antennaria Räsänen - Lendemer (2008: 98)
- Candelariella aurella (Hoffm.) Zahlbr. - Wetmore (1985: 244), Thomson (1997: 182)
- Candelariella efflorescens R. C. Harris & W. R. Buck - Wetmore (1985: 244)
- Candelariella subdeflexa (Nyl.) Lettau - Wetmore (1985: 244)
- Candelariella vitellina (Hoffm.) Müll. Arg. - Wetmore (1985: 244)
- Candelariella xanthostigma (Pers. ex Ach.) Lettau - Wetmore (1985: 244)
- Catillaria nigroclavata (Nyl.) J. Steiner - Wetmore (1985: 244)
- Catinaria atropurpurea (Schaer.) Vezda & Poelt - Thomson (1997: 201)
- Circinaria caesiocinerea (Nyl. ex Malbr.) A. Nordin, Savic & Tibell - Wetmore (1985: 243 as Aspicilia caesiocinerea)
- Circinaria contorta (Hoffm.) A. Nordin, Savic & Tibell - Wetmore (1985: 243 as Aspicilia contorta)
- Circinaria hispida (Mereschk.) A. Nordin, Savic & Tibell - Wetmore (1985: 243 as Agrestia hispida)
- Cladonia acuminata (Ach.) Norrl. - Wetmore (1985: 244)
- Cladonia bacillaris (Ach.) Genth - Wetmore (1985: 244)
- Cladonia chlorophaea (Flörke ex Sommerf.) Spreng. - Disrud & Trana (1973: 29), Thomson (1984: 119), Wetmore (1985: 244)
- Cladonia coniocraea (Flörke) Spreng. - Disrud & Trana (1973: 29), Wetmore (1985: 244)
- Cladonia cornuta (L.) Hoffm. subsp. cornuta - Thomson (1984: 124), Wetmore (1985: 244)
- Cladonia crispata (Ach.) Flot. var. crispata - Thomson (1984: 125)
- Cladonia cristatella Tuck. - Wetmore (1985: 244)
- Cladonia decorticata (Flörke) Spreng. - Wetmore (1985: 244)
- Cladonia fimbriata (L.) Fr. - Thomson (1984: 133), Wetmore (1985: 244)
- Cladonia glauca Flörke - Thomson (1984: 135)
- Cladonia gracilis (L.) Willd. subsp. gracilis - Wetmore (1985: 244)
- Cladonia gracilis (L.) Willd. subsp. turbinata (Ach.) Ahti - Thomson (1984: 136)
- Cladonia humilis (With.) J. R. Laundon - Wetmore (1985: 244)
- Cladonia mitis Sandst. - Thomson (1984: 148), Wetmore (1985: 244 as Cladina mitis)
- Cladonia pocillum (Ach.) O. J. Rich. - Thomson (1984: 156)
- Cladonia pyxidata (L.) Hoffm. - Disrud & Trana (1973: 29), Thomson (1984: 158), Wetmore (1985: 244)
- Cladonia rangiferina (L.) Weber ex F. H. Wigg. - Wetmore (1985: 244 as Cladina rangiferina)
- Cladonia robbinsii A. Evans - Wetmore (1985: 244)
- Cladonia subulata (L.) Weber ex F. H. Wigg. - Wetmore (1985: 244)
- Cladonia symphycarpa (Ach.) Fr. - Wetmore (1985: 244)
- Collema furfuraceum (Schaer.) Du Rietz - Wetmore (1985: 245)
- Dermatocarpon americanum Vain. - Heiðmarsson (2003: 466)
- Dermatocarpon miniatum (L.) W. Mann - Wetmore (1985: 245)
- Dermatocarpon moulinsii (Mont.) Zahlbr. - Wetmore (1985: 245)
- Dimelaena oreina (Ach.) Norman - Sheard (1974: xx), Wetmore (1985: 245), Thomson (1997: 216)
- Diploschistes actinostomus (Pers.) Zahlbr. - Wetmore (1985: 245)
- Diploschistes muscorum (Scop.) R. Sant. - Thomson (1997: 218)
- Diploschistes scruposus (Schreb.) Norman - Wetmore (1985: 245), Thomson (1997: 218)
- Diplotomma venustum (Körb.) Körb. - Wetmore (1985: 243 as Buellia venusta)
- Enchylium coccophorum (Tuck.) Otálora, P. M. Jørg. & Wedin - Wetmore (1985: 244 as Collema coccophorum)
- Enchylium conglomeratum Hoffm. - Wetmore (1985: 245 as Collema conglomeratum)
- Enchylium tenax (Sw.) Gray - Thomson (1984: 191 as Collema tenax), Wetmore (1985: 245 as Collema tenax)
- Endocarpon pusillum Hedw. - Wetmore (1985: 245)
- Epiphloea byssina (Hoffm.) Henssen & P. M. Jørg. - Thomson (1984: 256 as Leptogium byssinum)
- Evernia mesomorpha Nyl. - Disrud & Trana (1973: 29), Thomson (1984: 229), Wetmore (1985: 245)
- Flavoparmelia caperata (L.) Hale - Wetmore (1985: 246 as Parmelia caperata)
- Flavoplaca citrina (Hoffm.) Arup, Frödén & Søchting - Wetmore (1985: 243 as Caloplaca citrina)
- Flavopunctelia flaventior (Stirt.) Hale - Disrud & Trana (1973: 29 as Parmelia flaventior), Wetmore (1985: 246 as Parmelia flaventior)
- Flavopunctelia soredica (Nyl.) Hale - Disrud & Trana (1973: 30 as Parmelia ulophyllodes), Wetmore (1985: 246 as Parmelia soredica)
- Gyalolechia bracteata (Hoffm.) A. Massal. subsp. bracteata - Wetmore (1985: 245 as Fulgensia bracteata)
- Gyalolechia flavorubescens (Huds.) Søchting, Frödén & Arup - Wetmore (1985: 243 as Caloplaca flavorubescens)
- Gyalolechia fulgens (Sw.) Søchting, Frödén & Arup - Wetmore (1985: 245 as Fulgensia fulgens), Thomson (1997: 229 as Fulgensia fulgens)
- Gyalolechia xanthostigmoidea (Räsänen) Søchting, Frödén & Arup - Thomson (1997: 158 as Caloplaca discolor)
- Heppia lutosa (Ach.) Nyl. - Wetmore (1985: 245)
- Hyperphyscia adglutinata (Flörke) H. Mayrhofer & Poelt - Wetmore (1985: 245)
- Hypogymnia physodes (L.) Nyl. - Wetmore (1985: 245)
- Hypogymnia tubulosa (Schaer.) Hav. - Wetmore (1985: 245)
- Lecania erysibe (Ach.) Mudd - Wetmore (1985: 245)
- Lecania fuscella (Schaer.) A. Massal. - Wetmore (1985: 245)
- Lecanora albellula (Nyl.) Th. Fr. - Wetmore (1985: 245 as Lecanora piniperda), Thomson (1997: 299 as Lecanora piniperda)
- Lecanora allophana (Ach.) Nyl. - Thomson (1997: 266)
- Lecanora argopholis (Ach.) Ach. - Thomson (1997: 267)
- Lecanora chlarotera Nyl. - Wetmore (1985: 245), Thomson (1997: 273)
- Lecanora frustulosa (Dicks.) Ach. - Wetmore (1985: 245)
- Lecanora garovaglii (Körb.) Zahlbr. subsp. garovaglii - Wetmore (1985: 245)
- Lecanora hagenii (Ach.) Ach. - Wetmore (1985: 245)
- Lecanora muralis (Schreb.) Rabenh. - Wetmore (1985: 245), Thomson (1997: 295)
- Lecanora rupicola (L.) Zahlbr. - Wetmore (1985: 245), Thomson (1997: 303)
- Lecanora saligna (Schrad.) Zahlbr. - Wetmore (1985: 245)
- Lecidea atrobrunnea (Ram. ex Lam. & DC.) Schaer. subsp. atrobrunnea - Wetmore (1985: 245)
- Lecidea auriculata Th. Fr. subsp. auriculata - Thomson (1997: 329)
- Lecidea plana J. Lahm ex Körb. - Wetmore (1985: 245)
- Lecidea tessellata (Ach.) Flörke - Wetmore (1985: 245)
- Lecidella carpathica Körb. - Wetmore (1985: 245)
- Lecidella euphorea (Flörke) Kremp. - Wetmore (1985: 245), Thomson (1997: 397), Lendemer (2008: 97)
- Lecidella patavina (A. Massal.) Heufl. - Wetmore (1985: 245 as Lecidella inamoena), Wetmore (1985: 245 as Lecidella spitsbergensis), Thomson (1997: 401 as Lecidella spitsbergensis)
- Lecidella stigmatea (Ach.) Hertel & Leuckert - Wetmore (1985: 246)
- Lepraria lobificans Nyl. - Wetmore (1985: 246 as Lepraria finkii)
- Leproplaca cirrochroa (Ach.) Arup, Frödén & Søchting - Thomson (1997: 155 as Caloplaca cirrochroa)
- Lethagrium fuscovirens (With.) Otálora, P. M. Jørg. & Wedin - Wetmore (1985: 245 as Collema fuscovirens)
- Lichinella nigritella (Lettau) P. P. Moreno & Egea - Wetmore (1985: 247 as Thyrea nigritella)
- Lobothallia alphoplaca (Wahlenb. in Ach.) Hafellner - Wetmore (1985: 243 as Aspicilia alphoplaca), Thomson (1997: 59 as Aspicilia alphoplaca)
- Lobothallia melanaspis (Ach.) Hafellner - Thomson (1997: 82 as Aspicilia melanaspis)
- Megaspora verrucosa (Ach.) A. Massal. - Wetmore (1985: 246 as Pachyspora mutabilis), Thomson (1997: 443 as Pachyospora verrucosa)
- Melanohalea exasperatula (Nyl.) O. Blanco et al. - Disrud & Trana (1973: 29 as Parmelia exasperatula)
- Melanohalea septentrionalis (Lynge) O. Blanco et al. - Disrud & Trana (1973: 29), Thomson (1984: 311 as Parmelia septentrionalis)
- Melanohalea subolivacea (Nyl. in Hasse) O. Blanco et al. - Ahti (1966: xx as Parmelia subolivacea), Wetmore (1985: 246 as Parmelia subolivacea)
- Melanelixia albertana (Ahti) O. Blanco et al. - Disrud & Trana (1973: 29 as Parmelia albertana), Wetmore (1985: 246 as Parmelia albertana)
- Melanelixia subargentifera (Nyl.) O. Blanco et al. - Disrud & Trana (1973: 29 as Parmelia subargentifera), Wetmore (1985: 246 as Parmelia subargentifera)
- Melanelixia subaurifera (Nyl.) O. Blanco et al. - Thomson (1984: 316 as Parmelia subaurifera), Wetmore (1985: 246 as Parmelia subaurifera)
- Micarea misella (Nyl.) Hedl. - Wetmore (1985: 246 as Micarea globularis)
- Montanelia sorediata (Ach.) Divakar, A. Crespo, Wedin & Essl. - Wetmore (1985: 246 as Parmelia sorediosa)
- Montanelia tominii (Oxner) Divakar, A. Crespo, Wedin & Essl. - Wetmore (1985: 246 as Parmelia substygia)
- Mycobilimbia berengeriana (A. Massal.) Hafellner & V. Wirth - Wetmore (1985: 245 as Lecidea berengeriana)
- Mycobilimbia tetramera (De Not.) Vitik., Ahti, Kuusinen, Lommi & T. Ulvinen ex Hafellner & Türk - Thomson (1997: 422 as Mycobilimbia obscurata)
- Myelochroa galbina (Ach.) Elix & Hale - Disrud & Trana (1973: 29 as Parmelia galbina)
- Myriolecis dispersa (Pers.) Sliwa, Zhao Xin & Lumbsch - Wetmore (1985: 245 as Lecanora dispersa), Thomson (1997: 278 as Lecanora dispersa)
- Ochrolechia arborea (Kreyer) Almb. - Wetmore (1985: 246)
- Ochrolechia upsaliensis (L.) A. Massal. - Thomson (1997: 436)
- Parmelia sulcata Taylor - Disrud & Trana (1973: 29), Thomson (1984: 318), Wetmore (1985: 246)
- Peccania subnigra (B. de Lesd.) Wetmore - Wetmore (1985: 246)
- Peltigera canina (L.) Willd. - Disrud & Trana (1973: 30), Wetmore (1985: 246)
- Peltigera neckeri Hepp ex Müll. Arg. - Wetmore (1985: 246)
- Peltigera evansiana Gyeln. - Disrud & Trana (1973: 30)
- Peltigera praetextata (Flörke ex Sommerf.) Zopf - Wetmore (1985: 246)
- Peltigera rufescens (Weiss) Humb. - Thomson (1984: 333 as Peltigera canina var. rufescens), Wetmore (1985: 246)
- Peltula bolanderi (Tuck.) Wetmore - Wetmore (1985: 246)
- Peltula patellata (Bagl.) Swinscow & Krog - Wetmore (1985: 246 as Peltula polyspora)
- Pertusaria saximontana Wetmore - Wetmore (1985: 246)
- Phaeophyscia constipata (Norrl. & Nyl.) Moberg - Wetmore (1985: 246)
- Phaeophyscia endococcina (Körb.) Moberg - Thomson (1984: 348)
- Phaeophyscia hirsuta (Meresch.) Essl. - Wetmore (1985: 246 as Phaeophyscia cernohorskyi), Wetmore (1985: 246)
- Phaeophyscia kairamoi (Vain.) Moberg - Wetmore (1985: 246)
- Phaeophyscia nigricans (Flörke) Moberg - Wetmore (1985: 246)
- Phaeophyscia orbicularis (Neck.) Moberg - Disrud & Trana (1973: 30 as Physcia orbicularis), Wetmore (1985: 246)
- Phaeophyscia sciastra (Ach.) Moberg - Thomson (1984: 349)
- Phaeorrhiza sareptana (Tomin) H. Mayrh. & Poelt. - Wetmore (1985: 246), Thomson (1997: 468)
- Physcia adscendens (Th. Fr.) Oliv. - Disrud & Trana (1973: 30), Wetmore (1985: 247)
- Physcia aipolia (Humb.) Fürnr. - Disrud & Trana (1973: 30), Thomson (1984: 353), Wetmore (1985: 247)
- Physcia biziana (A. Massal.) Zahlbr. - Wetmore (1985: 247)
- Physcia caesia (Hoffm.) Fürnr. - Thomson (1984: 354), Wetmore (1985: 247)
- Physcia dakotensis Essl. - Esslinger (2004: 302 Type in DUKE)
- Physcia dimidiata (Arnold) Nyl. - Esslinger (1979: 211 First record for North America), Wetmore (1985: 247)
- Physcia dubia (Hoffm.) Lettau - Thomson (1984: 355), Wetmore (1985: 247)
- Physcia phaea (Tuck.) J. W. Thomson - Thomson (1984: 356)
- Physcia stellaris (L.) Nyl. - Disrud & Trana (1973: 30), Wetmore (1985: 247)
- Physcia subtilis Degel. - Wetmore (1985: 247)
- Physciella chloantha (Ach.) Essl. - Wetmore (1985: 246 as Phaeophyscia chloantha)
- Physciella melanchra (Hue) Essl. - Wetmore (1985: 246 as Phaeophyscia melanchra)
- Physconia detersa (Nyl.) Poelt - Thomson (1984: 359), Wetmore (1985: 247)
- Physconia muscigena (Ach.) Poelt - Thomson (1984: 360), Wetmore (1985: 247)
- Placidium arboreum (Schwein. ex E. Michener) Lendemer - Wetmore (1985: 245 as Dermatocarpon tuckermanii)
- Placidium lachneum (Ach.) B. de Lesd. - Wetmore (1985: 245 as Dermatocarpon lachneum)
- Placidium squamulosum (Ach.) Breuss - Thomson (1984: 215 as Dermatocarpon hepaticum)
- Placynthiella icmalea (Ach.) Coppins & P. James - Wetmore (1985: 247), Lendemer (2008: 98)
- Placynthium nigrum (Huds.) Gray - Wetmore (1985: 247)
- Polycauliona polycarpa (Hoffm.) Frödén, Arup & Søchting - Disrud & Trana (1973: 30 as Xanthoria polycarpa), Thomson (1984: 487 as Xanthoria polycarpa), Wetmore (1985: 248 as Xanthoria polycarpa)
- Polysporina simplex (Borrer ex Hook.) Vezda - Wetmore (1985: 247 as Sarcogyne simplex)
- Protoblastenia rupestris (Scop.) J. Steiner - Wetmore (1985: 247), Thomson (1997: 503)
- Psora decipiens (Hedw.) Hoffm. - Wetmore (1985: 245 as Lecidea decipiens), Thomson (1997: 507)
- Psora globifera (Ach.) A. Massal. - Wetmore (1985: 245 as Lecidea globifera), Thomson (1997: 508)
- Psora luridella (Tuck.) Fink - Wetmore (1985: 245 as Lecidea luridella)
- Psora russellii (Tuck.) A. Schneid. - Wetmore (1985: 245 as Lecidea russellii)
- Punctelia bolliana (Müll. Arg.) Krog - Disrud & Trana (1973: 29 as Parmelia bolliana)
- Pycnora xanthococca (Sommerf.) Hafellner - Wetmore (1985: 245 as Lecidea xanthococca)
- Ramalina fastigiata (Pers.) Ach. - Disrud & Trana (1973: 30)
- Ramalina sinensis Jatta - Wetmore (1985: 247)
- Ramalina unifolia J. W. Thomson - Thomson (1990: 341)
- Rhizocarpon disporum (Nägeli ex Hepp) Müll. Arg. - Wetmore (1985: 247)
- Rhizocarpon geminatum Körb. - Thomson (1997: 537)
- Rhizoplaca chrysoleuca (Sm.) Zopf - Wetmore (1985: 247), Thomson (1997: 554)
- Rhizoplaca melanophthalma (Ram.) Leuckert & Poelt - Wetmore (1985: 247)
- Rinodina bischoffii (Hepp) A. Massal. - Wetmore (1985: 247)
- Rinodina calcigena (Th. Fr.) Lynge - Wetmore (1985: 247), Thomson (1997: 562)
- Rinodina colobina (Ach.) Th. Fr. - Wetmore (1985: 247)
- Rinodina lobulata H. Mayrhofer & Sheard - Wetmore (1985: 247), Sheard & Mayrhofer (2002: 664 Type in WIS), Sheard (2010: 125)
- Rinodina terrestris Tomin - Wetmore (1985: 247 as Rinodina mucronatula)
- Rinodina pyrina (Ach.) Arnold - Wetmore (1985: 247)
- Rinodina riparia Sheard - Wetmore (1985: 247)
- Rinodina zwackhiana (Kremp.) Körb. - Wetmore (1985: 247)
- Rusavskia elegans (Link) S. Y. Kondr. & Kärnefelt - Thomson (1984: 484 as Xanthoria elegans), Wetmore (1985: 247 as Xanthoria elegans)
- Rusavskia sorediata (Vain.) S. Y. Kondr. & Kärnefelt - Thomson (1984: 487 as Xanthoria sorediata)
- Sarcogyne clavus (DC.) Kremp. - Wetmore (1985: 247)
- Sarcogyne dakotensis H. Magn. - Magnusson (1935: 139 Type), Knudsen & Standley (2007: 291)
- Sarcogyne regularis Körb. - Wetmore (1985: 247)
- Sarcosagium campestre (Fr.) Poetsch & Schied. - Thomson (1997: 119 as Biatorella campestris)
- Sclerophora pallida (Pers.) Y. J. Yao & Spooner - Wetmore (1985: 245 as Coniocybe pallida)
- Scytinium subtile (Schrad.) Otálora, P. M. Jørg. & Wedin - Wetmore (1985: 246 as Leptogium minutissimum)
- Scytinium tenuissimum (Dicks.) Otálora, P. M. Jørg. & Wedin - Wetmore (1985: 246 as Leptogium tenuissimum)
- Solitaria chrysophthalma (Degel.) Arup, Søchting & Frödén - Wetmore (1985: 243 as Caloplaca chrysophthalma)
- Squamarina lentigera (G. Web.) Poelt - Wetmore (1985: 247)
- Squamulea squamosa (B. de Lesd.) Arup, Søchting & Frödén - Wetmore (1985: 244 as Caloplaca squamosa)
- Staurothele areolata (Ach.) Lettau - Thomson (1997: 592)
- Staurothele drummondii (Tuck.) Tuck. - Wetmore (1985: 247 as Staurothele clopima), Thomson (1997: 595)
- Staurothele monicae (Zahlbr.) Wetmore - Wetmore (1985: 247)
- Staurothele elenkinii Oxner - Wetmore (1985: 247 erroneously as Staurothele rufa)
- Strangospora moriformis (Ach.) Stein - Lendemer (2008: 97)
- Toninia tristis (Th. Fr.) Th. Fr. subsp. tristis - Wetmore (1985: 247)
- Toniniopsis aromatica (Sm.) Kistenich, Timdal, Bendiksby & S. Ekman - Thomson (1997: 612 as Toninia aromatica)
- Trapeliopsis flexuosa (Fr.) Coppins & P. James - Lendemer (2008: 98)
- Trapeliopsis granulosa (Hoffm.) Lumbsch - Wetmore (1985: 245 as Lecidea granulosa), Thomson (1997: 624)
- Tuckermanopsis americana (Spreng.) Hale - Wetmore (1985: 244 as Cetraria halei)
- Umbilicaria muehlenbergii (Ach.) Tuck. - Thomson (1984: 26 as Actinogyra muhlenbergii), Wetmore (1985: 247)
- Usnea fulvoreagens (Räsänen) Räsänen - Wetmore (1985: 247)
- Usnea hirta (L.) Weber ex F. H. Wigg. - Thomson (1984: 466), Wetmore (1985: 247)
- Usnea subfloridana Stirt. - Disrud & Trana (1973: 30), Wetmore (1985: 247)
- Verrucaria inficiens Breuss - Wetmore (1985: 245 as Dermatocarpon plumbeum)
- Verrucaria muralis Ach. - Wetmore (1985: 247)
- Verrucaria glaucovirens Grummann - Wetmore (1985: 247 as Verrucaria virens)
- Vulpicida pinastri (Scop.) J.-E. Mattsson & M. J. Lai - Wetmore (1985: 244 as Cetraria pinastri)
- Xanthocarpia feracissima (H. Magn.) Frödén, Arup & Søchting - Wetmore (1985: 243 as Caloplaca feracissima)
- Xanthocarpia tominii (Savicz) Frödén, Arup & Søchting - Wetmore (1985: 244 as Caloplaca tominii), Thomson (1997: 175 as Caloplaca tominii)
- Xanthomendoza fallax (Hepp ex Arnold) Søchting, Kärnefelt & S. Y. Kondr. - Disrud & Trana (1973: 30 as Xanthoria fallax), Thomson (1984: 486 as Xanthoria fallax), Wetmore (1985: 248 as Xanthoria fallax)
- Xanthomendoza trachyphylla (Tuck.) Frödén, Arup & Søchting - Wetmore (1985: 244 as Caloplaca trachyphylla), Thomson (1997: 177 as Caloplaca trachyphylla)
- Xanthoparmelia chlorochroa (Tuck.) Hale - Thomson (1984: 477), Wetmore (1985: 246 as Parmelia chlorochroa)
- Xanthoparmelia conspersa (Ehrh. ex Ach.) Hale - Wetmore (1985: 246 as Parmelia conspersa)
- Xanthoparmelia lineola (E. C. Berry) Hale - Wetmore (1985: 246 as Parmelia lineola)
- Xanthoparmelia mexicana (Gyeln.) Hale - Wetmore (1985: 246 as Parmelia mexicana)
- Xanthoparmelia plittii (Gyeln.) Hale - Wetmore (1985: 246 as Parmelia plittii)
- Xylographa parallela (Ach.) Fr. - Wetmore (1985: 248 as Xylographa abietina), Thomson (1997: 646 as Xylographa abietina)