- Absconditella lignicola Vězda & Pišút - McCune et al. (2014: 15)
- Acarospora americana H. Magn. - Knudsen et al. (2011: ), McCune et al. (2014: 15)
- Acarospora badiofusca (Nyl.) Th. Fr. - McCune et al. (2014: 15 First record)
- Acarospora complanata H. Magn. - McCune et al. (2014: 15)
- Acarospora elevata H. Magn. - McCune et al. (2014: 16 First record)
- Acarospora fuscata (Nyl.) Arnold - McCune (1982: 16), Thomson (1997: 24), McCune et al. (2014: 16)
- Acarospora fuscescens H. Magn. - McCune et al. (2014: 16 First record)
- Acarospora glaucocarpa (Wahlenb. ex Ach.) Körb. - DeBolt & McCune (1993: ), Eversman et al. (1999: ), Salix & Eversman (2005: ), McCune et al. (2014: 16)
- Acarospora moenium (Vain.) Räsänen - McCune et al. (2014: 16 First record)
- Acarospora nevadensis H. Magn. - McCune et al. (2014: 16 First record)
- Acarospora obnubila H. Magn. - McCune et al. (2014: 16 First record)
- Acarospora oligospora (Nyl.) Arnold - McCune et al. (2014: 16 First record)
- Acarospora oreophila K. Knudsen - McCune et al. (2014: 16 First record)
- Acarospora peliscypha Th. Fr. - McCune et al. (2014: 17 First record)
- Acarospora rosulata (Th. Fr.) H. Magn. - McCune et al. (2014: 17 First record)
- Acarospora schleicheri (Ach.) A. Massal. - Hanna (1958), Looman (1964), DeBolt & McCune (1993), Thomson (1997: 33), McCune (1998), Damm (2001), McCune & Rosentreter (2007), McCune et al. (2014: 17)
- Acarospora sinopica (Wahlenb.) Körb. - McCune et al. (2014: 17 First record)
- Acarospora stapfiana (Müll. Arg.) Hue - Eversman et al. (1999: ), McCune et al. (2014: 16)
- Acarospora strigata (Nyl.) Jatta - Schubloom (1995: ), Eversman et al. (1999: ), Eversman & Schanz (1996: ), Salix & Eversman (2005), McCune et al. (2014: 17)
- Acarospora thamnina (Tuck.) Herre - Fink (1935), McCune (1998), McCune et al. (2014: 16)
- Acarospora veronensis A. Massal. - DeBolt & McCune (1993: ), Thomson (1997: 35), Eversman et al. (1999: ), Salix & Eversman (2005), McCune et al. (2014: 18)
- Adelolecia pilati (Hepp) Hertel & Hafellner - McCune et al. (2014: 18 First record)
- Agonimia tristicula (Nyl.) Zahlbr. - McCune et al. (2014: 18 First record)
- Ahtiana sphaerosporella (Müll. Arg.) Goward - Goward (1985, Lesica et al. (1991: ), DeBolt & McCune (1993: ), McCune (1998), McCune et al. (2014: 18)
- Alectoria imshaugii Brodo & D. Hawksw. - Brodo & Hawksworth (1977), Kärnefelt (1980), McCune & Antos (1982), McCune (1982: 16), McCune (1984: ), Lesica et al. (1991:), DeBolt & McCune (1993: ), Schubloom (1995), Hauck & Spribille (2002: xx), Hauck & Spribille (2005: 551), McCune et al. (2014: 19)
- Alectoria nigricans (Ach.) Nyl. - Imshaug (1957), Thomson (1984: 35), DeBolt & McCune (1993),
- Alectoria sarmentosa (Ach.) Ach. - Harris & Harris (1904: as Alectoria ochroleuca var. sarmentosa), Jones (1910: as Alectoria ochroleuca var. sarmentosa), Howe (1911), Fink (1935), Habeck (1963), Motyka (1964: ), Hawksworth (1972), Brodo & Hawksworth (1977), Eversman (1979), McCune (1982: 16), McCune & Antos (1982), McCune (1984), Lesica et al. (1991), DeBolt & McCune (1993), Schubloom (1995), McCune (1998:), Hauck & Spribille (2002), Hauck & Spribille (2005: 551), McCune et al. (2014: 19)
- Alectoria vexillifera (Nyl.) Stizenb. - McCune (1984), McCune (1998), DeBolt & McCune (1993: as Alectoria sarmentosa subsp. vexillifera), McCune et al. (2014: 19)
- Allantoparmelia alpicola (Th. Fr.) Essl. - Thomson (1984: 299 as Parmelia alpicola), McCune (1984), DeBolt & McCune (1993), McCune (1998), McCune et al. (2014: 20)
- Allocetraria madreporiformis (Ach.) Kärnefelt & A. Thell - McCune et al. (2014: 20)
- Amandinea punctata (Hoffm.) Coppins & Scheid. - McCune (1982: 17 as Buellia punctata), Eversman (1982: 211 as Buellia punctata), Thomson (1997: 138 as Buellia punctata), McCune (1998), Eversman et al. (1999), Hauck & Spribille (2002), Hauck & Spribille (2005: 551), McCune et al. (2014: 20 as Buellia punctata)
Anaptychia elbursiana (Szatala) Poelt - McCune et al. (2014: 20)
Anaptychia ulotrichoides (Vain.) Vain. - McCune et al. (2014: 20)
Anzina carneonivea (Anzi) Scheid. - McCune et al. (2014: 20)
Arctomia delicatula Th. Fr. - McCune et al. (2014: 20)
Arctoparmelia centrifuga (L.) Hale - McCune et al. (2014: 20)
Arctoparmelia subcentrifuga (Oxner) Hale - McCune et al. (2014: 21)
Arthonia apatetica (A. Massal.) Th. Fr. - McCune et al. (2014: 21)
Arthonia glebosa Tuck. - , McCune et al. (2014: 21)
Arthonia lapidicola (Taylor) Branth & Rostrup - McCune et al. (2014: 21)
Arthonia mediella Nyl. - McCune et al. (2014: 21)
Arthonia muscigena Th. Fr. - McCune et al. (2014: 21)
- Arthonia patellulata Nyl. - Thomson (1997: 47), McCune et al. (2014: 21)
Arthrorhaphis citrinella (Ach.) Poelt - McCune et al. (2014: 21)
Aspicilia americana B. de Lesd. - McCune et al. (2014: 22)
Aspicilia aquatica Körb. - McCune et al. (2014: 22)
Aspicilia arctica (Lynge) Oxner - McCune et al. (2014: 22)
- Aspicilia candida (Anzi) Hue - Thomson (1997: 67), McCune et al. (2014: 22)
x - Aspicilia cinerea (L.) Körb. - McCune (1982: 16), Thomson (1997: 68), McCune et al. (2014: 22)
x - Aspicilia cingulata (Zahlbr.) Oxner - Thomson (1997: 70), McCune et al. (2014: 22)
Aspicilia confusa Owe-Larsson & A. Nordin - McCune et al. (2014: 22)
Aspicilia cyanescens Owe-Larsson & A. Nordin - McCune et al. (2014: 23)
Aspicilia filiformis Rosentreter - McCune et al. (2014: 23)
Aspicilia intermutans (Wahlenb.) Th. Fr. - McCune et al. (2014: 23)
Aspicilia knudsenii Owe-Larsson & A. Nordin - McCune et al. (2014: 23)
Aspicilia laevata (Ach.) Arnold - McCune et al. (2014: 23)
x - Aspicilia lesleyana Darbish. - Thomson (1997: 79), McCune et al. (2014: 23)
Aspicilia mansourii Sohrabi - McCune et al. (2014: 23)
Aspicilia reptans (Looman) Wetmore - McCune et al. (2014: 24)
Aspicilia subplicigera (H. Magn.) Oxner - McCune et al. (2014: 24)
x - Aspicilia subradians (Nyl.) Hue - Thomson (1997: 94), McCune et al. (2014: 24)
x - Aspicilia supertegens Arnold - Thomson (1997: 95), McCune et al. (2014: 24)
Bacidia akompsa (Tuck.) Fink - McCune et al. (2014: 24)
Bacidia auerswaldii (Hepp ex Stizenb.) Mig. - McCune et al. (2014: 24)
Bacidia bagliettoana (A. Massal. & De Not.) Jatta - McCune et al. (2014: 24)
Bacidia circumspecta (Nyl. ex Vain.) Malme - McCune et al. (2014: 24)
Bacidia idahoensis H. Magn. -
x
- Bacidia idahoensis H. Magn. - McCune (1982: 16), McCune et al. (2014: 24)
Bacidia subincompta (Nyl.) Arnold - McCune et al. (2014: 25)
Bacidia vermifera (Nyl.) Th. Fr. - McCune et al. (2014: 25)
Bacidina contecta S. Ekman & T. Sprib. - McCune et al. (2014: 25)
Bacidina egenula (Nyl.) Vezda - McCune et al. (2014: 26 First record)
Bacidina inundata (Fr.) Vezda - McCune et al. (2014: 26 First record)
Bacidina ramea S. Ekman - McCune et al. (2014: 26 First record)
Baeomyces rufus (Huds.) Rebent. - McCune et al. (2014: 26)
- Bellemerea alpina (Sommerf.) Clauz. & Roux - McCune (1982: 16 as Aspicilia alpina), Thomson (1997: 115), McCune et al. (2014: 26)
- Bellemerea cinereorufescens (Ach.) Clauz. & Roux - Thomson (1997: 116), McCune et al. (2014: 26)
Bellemeria diamarta (Ach.) Hafellner & Cl. Roux - Brodo et al. (1987: xx), McCune et al. (2014: 26)
Biatora aurolepra T. Sprib. & Tønsberg - Spribille et al. (2009: xx First record), McCune et al. (2014: 26)
Biatora beckhausii (Körb.) Tuck. - McCune et al. (2014: 26)
x - Biatora chrysantha (Zahlbr.) Printzen in V. Wirth - Hauck & Spribille (2005: 551)
Biatora fallax Hepp - Printzen & Tønsberg (1999: xx First record), McCune et al. (2014: 26)
x - Biatora flavopunctata (Tønsberg) Hinter. & Printzen - Printzen & Tønsberg (1999: xx), Hauck & Spribille (2005: 551), Obermayer (2011: xx), McCune et al. (2014: 26 First record)
Biatora globulosa (Flörke) Fr. - McCune et al. (2014: 26 First record)
Biatora rufidula (Graewe in Hellb.) S. Ekman & Printzen - Printzen & Tønsberg (1999: xx First record), Hauck & Spribille (2002: xx), McCune et al. (2014: 26)
Biatora subduplex (Nyl.) Printzen - Printzen & Tønsberg (1999: xx), McCune et al. (2014: 26 First record)
x - Biatora toensbergii Holien & Printzen - Hauck & Spribille (2005: 551) not mentioned for Montana by McCune et al. 2014
Biatora vacciniicola (Tønberg) Printzen - Printzen & Tønsberg (1999), McCune et al. (2014: 27)
Biatoridium delitescens (Arnold) Hafellner - Ekman (1996: 67), McCune et al. (2014: 27)
Bilimbia lobulata (Sommerf.) Hafellner & Coppins - McCune et al. (2014: 27)
Bilimbia microcarpa (Th. Fr.) Th. Fr. - McCune et al. (2014: 28)
Bilimbia sabuletorum (Schreber) Arnold - McCune et al. (2014: 28)
Brianaria bauschiana (Körb.) S. Ekman & M. Svensson - McCune et al. (2014: 28 First record)
Brigantiaea praetermissa Hafellner & St. Clair - McCune et al. (2014: 28)
Brodoa oroarctica (Krog) Goward - McCune et al. (2014: 28)
Bryobilimbia hypnorum (Lib.) Fryday, Printzen & S. Ekman - McCune et al. (2014: 28)
x
- Bryonora castanea (Hepp) Poelt - Thomson (1997: 122), McCune et al. (2014: 28)
Bryonora pruinosa (Th. Fr.) Holtan-Hartwig - McCune et al. (2014: 28)
x - Bryoria capillaris (Ach.) Brodo & D. Hawksw. - McCune (1982: 16), Thomson (1984: 55), Hauck & Spribille (2005: 551), McCune et al. (2014: 29)
x - Bryoria fremontii (Gyeln.) Brodo & D. Hawksw. - McCune (1982: 16), Spribille (2002: 20 as Bryoria tortuosa), Hauck & Spribille (2005: 551), McCune et al. (2014: 29)
x - Bryoria friabilis Brodo & D. Hawksw. - McCune (1982: 16), McCune et al. (2014: 29)
x - Bryoria fuscescens (Gyeln.) Brodo & D. Hawksw. - McCune (1982: 16), McCune (1982: 16 as Bryoria lanestris), Eversman (1982: 211), Thomson (1984: 57), Thomson (1984: 59 as Bryoria lanestris), Hauck & Spribille (2005: 551), McCune et al. (2014: 29)
x - Bryoria glabra (Mot.) Brodo & D. Hawksw. - Thomson (1984: 58), Hauck & Spribille (2005: 551), McCune et al. (2014: 29)
Bryoria implexa (Hoffm.) Brodo & D. Hawksw. - McCune et al. (2014: 29)
Bryoria lanestris (Ach.) Brodo & D. Hawksw. - McCune et al. (2014: 30)
x - Bryoria nadvornikiana (Gyeln.) Brodo & D. Hawksw. - Thomson (1984: 61), McCune et al. (2014: 30)
x - Bryoria pseudofuscenscens (Gyeln.) Brodo & D. Hawksw. - McCune (1982: 17), Thomson (1984: 63), McCune et al. (2014: 30)
x - Bryoria simplicior (Vain.) Brodo & D. Hawksw. - Thomson (1984: 65), McCune et al. (2014: 30)
x - Bryoria trichodes (Michx.) Brodo & D. Hawksw. subsp. trichodes - Thomson (1984: 68)
x - Bryoria vrangiana (Gyeln.) Brodo & D. Hawksw.- Thomson (1984: 69)
x
- Buellia disciformis (Fr.) Muss. - Thomson (1997: 129)
x - Buellia elegans Poelt - Thomson (1997: 130)
x - Buellia griseovirens (Turner & Borrer ex Sm.) Almb. - Hauck & Spribille (2005: 551)
x - Buellia dispersa xxx - McCune (1982: 17 as Buellia retrovertens)
x
- Calicium adaequatum Nyl. - McCune (1982: 17)
- Calicium corynellum (Ach.) Ach. - Kolb & Spribille (2001: 91)
- Calicium glaucellum - Hauck & Spribille (2005: 551)
- Calicium viride Pers. - McCune (1982: 17), Thomson (1997: 146), Hauck & Spribille (2005: 551)
- Caloplaca ammiospila (Ach.) Oliv. - Thomson (1997: 151)
- Caloplaca crenularia (With.) J. R. Laundon - Thomson (1997: 157)
- Caloplaca diphyodes (Nyl.) Jatta - Anderson (1967: 339)
- Caloplaca fraudans (Th. Fr.) Oliv. - Thomson (1997: 162)
- Caloplaca furfuracea H. Magn. - Wetmore (2004: 289)
- Caloplaca holocarpa (Hoffm.) Wade - Thomson (1997: 164)
- Caloplaca jungermanniae (Vahl) Th. Fr. - Thomson (1997: 166)
- Caloplaca stillicidiorum (Vahl) Lynge - McCune (1982: 17), Thomson (1997: 172)
- Caloplaca tominii Savicz - Thomson (1997: 175)
- Candelariella aurella (Hoffm.) Zahlbr. - Thomson (1997: 182)
- Candelariella terrigena Räsänen - Thomson (1997: 187)
- Candelariella vitellina (Hoffm.) Müll. Arg. - McCune (1982: 17), Eversman (1982: 211), Thomson (1997: 189)
- Carbonea vorticosa (Flörke) Hertel - Thomson (1997: 193)
- Catillaria glauconigrans (Tuck.) Hasse - Thomson (1997: 197)
- Catinaria atropurpurea (Schaer.) Vezda & Poelt - Thomson (1997: 201)
- Catolechia wahlenbergii (Ach.) Körb. - Thomson (1997: 202)
x
- Cetraria ericetorum Opiz subsp. ericetorum - Thomson (1984: 79)
x - Cetraria ericetorum Opiz subsp. reticulatum (Räsänen) Kärnefelt - McCune (1982: 17)
- Cetraria hepatizon (Ach.) Vain. - Thomson (1984: 82)
- Cetraria idahoensis Essl. - Esslinger (1971: 366), McCune (1982: 17)
- Cetraria islandica (L.) Ach. - Thomson (1984: 84)
- Cetraria merrillii Du Rietz - McCune (1982: 17)
- Cetraria orbata (Nyl.) Fink - McCune (1982: 17)
- Cetraria platyphylla Tuck. - McCune (1982: 17)
- Cetraria sepincola (Ehrh.) Ach. - McCune (1982: 17)
- Cetrariella commixta(Nyl.) A. Thell & Kärnefelt - Thomson (1984: 75 as Cetraria commixta)
- Chaenotheca chrysocephala (Turner ex Ach.) Th. Fr. - Thomson (1997: 205), Hauck & Spribille (2005: 551)
- Chaenotheca subroscida - Hauck & Spribille (2005: 551)
- Chaenotheca trichialis - Hauck & Spribille (2005: 551)
- Chaenothecopsis nana - Hauck & Spribille (2005: 551)
- Circinaria caesiocinerea (Nyl. ex Malbr.) Arnold - McCune (1982: 16 as Aspicilia caesiocinerea), Thomson (1997: 65 as Aspicilia caesiocinerea)
- Cladonia arbuscula (Wallr.) Hale & W. Culb. - McCune (1982: 17)
- Cladonia bacillaris (Ach.) Nyl. - McCune (1982: 17), Thomson (1984: 111)
- Cladonia cariosa (Ach.) Spreng. - McCune (1982: 17), Thomson (1984: 116)
- Cladonia carneola (Fr.) Fr. - McCune (1982: 17), Thomson (1984: 117)
- Cladonia cenotea (Ach.) Schaer. - McCune (1982: 17), Thomson (1984: 118)
- Cladonia chlorophaea ( Flörke ex. Sommerf.) Spreng. - McCune (1982: 17), Thomson (1984: 119)
- Cladonia coccifera (L.) Willd. - McCune (1982: 17), Thomson (1984: 121)
- Cladonia coniocraea (Flörke) Spreng. - McCune (1982: 17), Thomson (1984: 122), Hauck & Spribille (2005: 551)
- Cladonia cornuta (L.) Hoffm. - McCune (1982: 17), Thomson (1984: 124)
- Cladonia deformis (L.) Hoffm. - McCune (1982: 17), Thomson (1984: 129)
- Cladonia digitata (L.) Hoffm. - Thomson (1984: 131)
- Cladonia ecmocyna Leight. - McCune (1982: 17), Thomson (1984: 132)
- Cladonia fimbriata (L.) Fr. - McCune (1982: 17), Thomson (1984: 133), Hauck & Spribille (2005: 551)
- Cladonia furcata (Huds.) Schrad. - McCune (1982: 17)
- Cladonia gracilis (L.) Willd. ssp. turbinata (Ach.) Ahti - Thomson (1984: 136)
- Cladonia gracilis (L.) Willd. var. gracilis - Thomson (1984: 137)
- Cladonia macrophyllodes Nyl. - Thomson (1984: 143)
- Cladonia merochlorophaea Asah. - McCune (1982: 17)
- Cladonia mitis Sandst. - McCune (1982: 17), Thomson (1984: 148)
- Cladonia multiformis Merr. - McCune (1982: 17), Thomson (1984: 149)
- Cladonia norrlinii Vain. - McCune (1982: 17)
- Cladonia phyllophora Hoffm. - McCune (1982: 17)
- Cladonia pleurota (Flörke) Schaer. - McCune (1982: 17), Thomson (1984: 154)
- Cladonia pyxidata (L.) Hoffm. - McCune (1982: 17), Thomson (1984: 158)
- Cladonia rangiferina (L.) F. H. Wigg. - Thomson (1984: 159)
- Cladonia squamosa (Scop.) Hoffm. - McCune (1982: 17), Hauck & Spribille (2005: 551)
- Cladonia subulata (L.) F. H. Wigg. - McCune (1982: 17), Thomson (1984: 168)
- Cladonia sulphurina (Michx.) Fr. - McCune (1982: 17)
- Cladonia umbricola Tønsberg & Ahti - McCune (1982: 17), Hauck & Spribille (2005: 551)
- Cladonia verruculosa (Vain.) Ahti - McCune (1982: 17)
- Cladonia verticillata (Hoffm.) Schaer. - McCune (1982: 17)
- Collema curtispora Degel. - McCune (1982: 17)
- Collema furfuraceum (Arnold) Du Rietz - McCune (1982: 17)
- Collema tenax (Sw.) Ach. - McCune (1982: 17)
- Collema tuniforme (Ach.) Ach. - Thomson (1984: 192)
- Coniocybe furfuracea (L.) Ach. - McCune (1982: 17), Thomson (1997: 210)
- Cornicularia aculeata (Schreb.) Ach. - Thomson (1984: 198)
- Cyphelium inquinans (Sm. in Sm. & Sow.) Trevisan - McCune (1982: 17), Thomson (1997: 212), Hauck & Spribille (2005: 551)
- Cyphelium tigillare - Eversman (1982: 211)
- Cystocoleus ebeneus (Dill.) Thwaites - Anderson (1967: 339)
- Dactylina madreporiformis (Ach.) Tuck.- Thomson (1984: 206)
- Dactylina ramulosa (Hook.) Tuck. - Thomson (1984: 207)
- Dermatocarpon americanum Vain. - Heidmarsson (2003: 466)
- Dermatocarpon cinereum (Pers.) Th. Fr. - Thomson (1984: 211)
- Dermatocarpon fluviatile (Web.) Th. Fr. - Thomson (1984: 213)
- Dermatocarpon hepaticum (Ach.) Th. Fr. - Thomson (1984: 215)
- Dermatocarpon intestiniforme (Körb.) Hasse - Thomson (1984: 216)
- Dermatocarpon miniatum (L.) Mann. - McCune (1982: 17), Thomson (1984: 219)
- Dermatocarpon moulinsii (Mont.) Zahlbr. - McCune (1982: 17)
- Dermatocarpon reticulatum H. Magn. - McCune (1982: 17)
- Dimelaena oreina (Ach.) Norm. - McCune (1982: 17)
- Dimerella diluta (Pers.) Trev. - McCune (1982: 17)
- Dimerella pineti - Hauck & Spribille (2005: 551)
- Diploschistes muscorum (Scop.) R. Sant. - Thomson (1997: 218)
- Diploschistes scruposus (Schreber) Norman - McCune (1982: 18), Thomson (1997: 218)
x
- Diplotomma nivalis (Bagl. & Carest.) Hertel ex Hafellner - Thomson (1997: 134 as Buellia nivalis)
x - Diplotomma penichrum (Tuck.) Hasse - McCune (1982: 17 as Buellia penichra), Hauck & Spribille (2005: 551 as Buellia penichra)
- Endocarpon tortuosum Herre- Thomson (1984: 222)
- Euopsis granatina (Sommerf.) Nyl. - Thomson (1997: 223)
- Evernia divaricata (L.) Ach. - Thomson (1984: 228 Alpine variant)
- Evernia mesomorpha - Eversman (1982: 211)
- Farnoldia micropsis (A. Massal.) Hertel - Thomson (1997: 226)
- Flavocetraria nivalis (L.) Ach. - Thomson (1984: 92 as Cetraria nivalis)
x
- Fulgensia bracteata (Hoffm.) Räsänen - Thomson (1997: 228)
x
- Fuscopannaria cheiroloba (Müll. Arg.) P. M. Jørg. - Müller Argau (2000: 679 Type ), Jørgensen (2001: xxx ), Jørgensen et al. (2010: 2)
- Gallowayella tibellii (S. Y. Kondr. & Kärnefelt) S. Y. Kondr., Fedorenko, S. Stenroos, Kärnefelt, Elix, J.S. Hur & A. Thell - Kondratyuk & Kärnefelt (2003: 125 as Xanthoria tibellii Type in KRAM-L), xx (2012: xx)
- Gyalolechia fulgens (Sw.) Søchting, Frödén & Arup - Thomson (1997: 229 as Fulgensia fulgens)
- Heppia lutosa (Ach.) Nyl. - Thomson (1997: 244)
- Hypogymnia austerodes Nyl. - McCune (1982: 18), Thomson (1984: 237), Hauck & Spribille (2005: 551)
- Hypogymnia bitteri (Lynge) Ahti - Eversman (1982: 211), Thomson (1984: 238)
- Hypogymnia imshaugii Krog - McCune (1982: 18), Hauck & Spribille (2005: 551)
- Hypogymnia metaphysodes (Asah.) Rass. - McCune (1982: 18), Hauck & Spribille (2005: 551)
- Hypogymnia occicentalis Pike - McCune (1982: 18), Hauck & Spribille (2005: 551)
- Hypogymnia oroacrctica Krog - Thomson (1984: 239)
- Hypogymnia physodes (L.) Nyl. - McCune (1982: 18), Eversman (1982: 211), Thomson (1984: 241), Hauck & Spribille (2005: 551)
- Hypogymnia rugosa (Merr.) Pike - McCune (1982: 18), Hauck & Spribille (2005: 551)
- Hypogymnia tubulosa (Schaer.) Hav. - McCune (1982: 18), Hauck & Spribille (2005: 551)
- Hypogymnia vittata (Ach.) Gas. - Thomson (1984: 243)
- Icmadophila ericetorum (L.) Zahlbr. - McCune (1982: 18), Thomson (1997: 249)
x
- Ionaspis lacustris (With.) Lutzoni - Thomson (1997: 245 as Hymenelia lacustris)
x
- Japewia subaurifera Muhr & Tønsberg - Hauck & Spribille (2005: 551)
- Lecania syringea (Ach.) Th. Fr. - McCune (1982: 18)
- Lecanora argopholis (Ach.) Ach. - Thomson (1997: 267)
- Lecanora badia (Hoffm.) Ach. - Thomson (1997: 269)
- Lecanora boligera - Hauck & Spribille (2005: 551)
- Lecanora cadubriae (A. Massal.) Hedl. - McCune (1982: 18), Thomson (1997: 271), Hauck & Spribille (2005: 551)
- Lecanora carpinea Tuck. - McCune (1982: 18)
- Lecanora cenisia Ach. . - Thomson (1997: 272)
- Lecanora circumborealis Brodo & Vitik. - Thomson (1997: 274), Hauck & Spribille (2005: 551)
- Lecanora coilocarpa (Ach.) Nyl. - McCune (1982: 18)
- Lecanora epibryon (Ach.) Ach. - Thomson (1997: 279)
- Lecanora fuscescens (Sommerf.) Nyl. - Thomson (1997: 283), Hauck & Spribille (2005: 551)
- Lecanora fuliginosa Brodo - Thomson (1997: 281)
- Lecanora hagenii (Ach.) Ach. - McCune (1982: 18), Thomson (1997:286)
- Lecanora intricata (Ach.) Ach.- Thomson (1997: 288)
x - Lecanora laxa (Sliwa & Wetmore) Printzen - Hauck & Spribille (2005: 551)
x - Lecanora marginata (Schaer.) Hertel & Rambold- Thomson (1997: 291)
x - Lecanora muralis (Schreb.) Rabenh. - McCune (1982: 18), Thomson (1997: 295)
x - Lecanora albellula xxx - Eversman (1982: 211 as Lecanora piniperda), Thomson (1997: 299 as Lecanora piniperda)
x - Lecanora polytropa (Ehrh. in Hoffm.) Rabenh. - McCune (1982: 18), Thomson (1997: 299)
- Lecanora pulicaris - McCune (1982: 18), Thomson (1997: 301)
- Lecanora rugosella Zahlbr. - McCune (1982: 18), Thomson (1997: 301)
- Lecanora rupicola (L.) Zahlbr. - McCune (1982: 18), Thomson (1997: 303)
- Lecanora symmicta (Ach.) Ach. - Thomson (1997: 309), Hauck & Spribille (2005: 551)
- Lecanora varia (Hoffm.) Ach. - McCune (1982: 18), Thomson (1997: 311)
- Lecidea atrobrunnea (Ramond ex Lam. & DC.) Schaer. - McCune (1982: 18), Thomson (1997: 327)
- Lecidea amaurospoda - Hauck & Spribille (2005: 551)
- Lecidea auriculata Th. Fr. - McCune (1982: 18), Thomson (1997: 329)
- Lecidea berengeriana (A. Massal.) Th. Fr. - McCune (1982: 18), Thomson (1997: 331)
- Lecidea cinnabarina Sommerf. - McCune (1982: 18), Thomson (1997: 336)
- Lecidea dolodes Nyl. - McCune (1982: 18)
- Lecidea granulosa (Ehrh.) Ach. - McCune (1982: 18)
- Lecidea hypopta - Hauck & Spribille (2005: 551)
- Lecidea insularis Nyl. - McCune (1982: 18)
- Lecidea lapicida (Ach.) Ach. - Thomson (1997: 357)
- Lecidea leprarioides - Hauck & Spribille (2005: 551)
- Lecidea leucophaea (Flörke ex Rabenh.) Nyl. - Thomson (1997: 359)
- Lecidea leucothallina Arnold - Thomson (1997: 360)
- Lecidea marginata Schaer. - McCune (1982: 18)
- Lecidea nylanderi - Hauck & Spribille (2005: 551)
- Lecidea pantherina (Hoffm.) Th. Fr. - McCune (1982: 18)
- Lecidea paupercula Th. Fr. - Thomson (1997: 369)
- Lecidea tessellata Flörke - Thomson (1997: 384)
- Lecidea umbonata (Hepp.) Mudd - Thomson (1997: 389)
x
- Lecidella carpathica Körb. - McCune (1982: 18)
x - Lecidella elaeochroma (Ach.) M. Choisy - Thomson (1997: 396), Hauck & Spribille (2005: 551)
x - Lecidella euphorea (Flörke) Hertel - Thomson (1997: 398)
- Lecidella glomerulosa (DC.) Choisy - McCune (1982: 18)
- Lecidella stigmatea (Ach.) Hert. & Leuckert - McCune (1982: 18)
- Lecidoma demissum (Rutstr.) Schneider & Hertel - Thomson (1997: 405)
- Lepraria finkii (B. de Lesd. in Hue) R. C. Harris - McCune (1982: 18)
- Lepraria jackii - Hauck & Spribille (2005: 551)
- Leprocaulon subalbicans (J. M. Lamb) J. M. Lamb & Ward - Thomson (1984: 250)
- Leptogium lichenoides (L.) Zahlbr. - McCune (1982: 18), Thomson (1984: 257)
- Leptogium minutissiumum (Dicks.) Fr.- Thomson (1984: 258)
- Leptogium saturninum (Dicks.) Nyl. - McCune (1982: 18), Thomson (1984: 262)
- Letharia columbiana (Nutt.) Thoms. - McCune (1982: 18)
- Letharia vulpina (L.) Hue - McCune (1982: 18), Eversman (1982: 211), Hauck & Spribille (2005: 551)
- Lichenostigma semiimmersa Hafellner - Hafellner (1999: 514)
- Lobaria hallii (Tuck.) Zahlbr. - McCune (1982: 18), Thomson (1984: 266)
- Lobaria linita (Ach.) Rabenh. - Thomson (1984: 269)
- Lobaria pulmonaria (L.) Hoffm. - McCune (1982: 18)
- Lobothallia alphoplaca (Wahlenb. in Ach.) xxx - Thomson (1997: 59 as Aspicilia alphoplaca)
- Lobothallia melanaspis (Ach.) xxx - Thomson (1997: 82 as Aspicilia melanaspis)
- Lopadium pezizoideum (Ach.) Körb. - McCune (1982: 18)
- Massalongia carnosa (Dicks.) Körb. - McCune (1982: 18), Thomson (1984: 274)
x
- Melanelixia subaurifera (Nyl.) O. Blanco et al. - McCune (1982: 18 as Melanelia subaurifera)
x - Melanohalea elegantula (Zahlbr.) O. Blanco et al. - McCune (1982: 18 as Melanelia elegantula)
x - Melanohalea exasperatula (Nyl.) O. Blanco et al. - Eversman (1982: 211 as Melanelia exasperatula)
x - Melanohalea multispora (A. Schneid.) O. Blanco et al. - McCune (1982: 18 as Melanelia multispora)
x - Melanohalea subelegantula (Essl.) O. Blanco et al. - McCune (1982: 18 as Melanelia subelegantula)
x - Melanohalea subolivacea (Nyl.) O. Blanco et al. - McCune (1982: 18 as Melanelia subolivacea), Eversman (1982: 211 as Melanelia subolivacea)
x
- Montanelia sorediata (Ach.) Divakar, A. Crespo, Wedin & Essl. - McCune (1982: 18 as Melanelia sorediosa)
x
- Mycobilimbia pilularis (Dicks.) Zahlbr. - McCune (1982: 16 as Bacidia sphaeroides)
x
- Mycobilimbia sabuletorum (Schreb.) Hafellner - McCune (1982: 16 as Bacidia sabuletorum), Thomson (1997: 422)
x - Mycobilimbia tetramera xxx - McCune (1982: 16 as Bacidia obscurata)
x
- Mycoblastus sanguinarius (L.) Norman - McCune (1982: 18), Thomson (1997: 426), Hauck & Spribille (2005: 551)
x - Japewia tornoënsis (Nyl.) R. Anders - McCune (1982: 18 as Mycoblastus tornoensis)
x
- Nephroma bellum (Spreng.) Tuck. - McCune (1982: 18), Thomson (1984: 278)
x - Nephroma helveticum Ach. var. helveticum - McCune (1982: 19), Thomson (1984: 280)
x - Nephroma parile (Ach.) Ach. - McCune (1982: 19), Thomson (1984: 282)
x - Nephroma resupinatum (L.) Ach. - McCune (1982: 19), Thomson (1984: 283)
x
- Nodobryoria abbreviata (Müll. Arg.) xxx - McCune (1982: 16 as Bryoria abbreviata), Hauck & Spribille (2005: 551)
x - Nodobryoria oregana (Tuck.) Common & Brodo - Howe (1911: as Alectoria oregana), McCune (1982: 16 as Bryoria oregana), Hauck & Spribille (2005: 551)
x - Nodobryoria subdivergens (Dahl) Brodo & D. Hawksw. - Thomson (1984: 66 as Bryoria subdivergens)
x
- Ochrolechia gowardii Brodo - Hauck & Spribille (2005: 551)
x - Ochrolechia juvenalis Brodo - Hauck & Spribille (2005: 551)
x - Ochrolechia upsaliensis (L.) A. Massal. - McCune (1982: 19), Thomson (1997: 436)
- Omphalodiscus krascheninnikovii (Sav.) Schol. - Thomson (1984: 289)
- Omphalodiscus virginis (Schaer.) Schol. - Thomson (1984: 290)
- Pachyospora verrucosa (Ach.) A. Massal. - McCune (1982: 19), Thomson (1997: 443)
- Pannaria praetermissa Nyl. - McCune (1982: 19)
- Parmelia disjuncta Erichs. - Thomson (1984: 299 as Parmelia disjuncta)
- Parmelia elegantula (Zahlbr.) Szat. - Thomson (1984: 300 as Parmelia elegantula)
- Parmelia exasperatula Nyl. - Thomson (1984: 300 as Parmelia exasperatula)
- Parmelia hygrophila - , Hauck & Spribille (2005: 552)
- Parmelia omphalodes (L.) Ach. - Thomson (1984: 308)
- Parmelia panniformis (Nyl.) Vain. - Thomson (1984: 309)
- Parmelia saxatilis (L.) Ach. - McCune (1982: 19), Thomson (1984: 310)
- Parmelia skultii Hale - McCune (2007: 76)
- Parmelia soredica - Eversman (1982: 211)
- Parmelia sorediosa Almb. - Thomson (1984: 312)
- Parmelia sphaerosporella Müll. Arg. - McCune (1982: 19 as Parmelia sphaerosporella)
- Parmelia stygia var. contrubata (Arn.) Dalla Torre & Sarnth. - Thomson (1984: 315 as Parmelia stygia var. contrubata)
- Parmelia subaurifera Nyl. - Thomson (1984: 316 as Parmelia subaurifera)
- Parmelia sulcata Tayl. - McCune (1982: 19), Eversman (1982: 211), Thomson (1984: 318), Hauck & Spribille (2005: 552)
- Parmeliella praetermissa (Nyl.) James - Thomson (1984: 320)
- Parmeliopsis aleurites (Ach.) Nyl. - McCune (1982: 19)
- Parmeliopsis ambigua (Wulf.) Nyl. - McCune (1982: 19), Eversman (1982: 211), Thomson (1984: 325), Hauck & Spribille (2005: 552)
- Parmeliopsis hyperopta (Ach.) Arnold - McCune (1982: 19), Thomson (1984: 326), Hauck & Spribille (2005: 552)
- Parmeliopsis placorodia - Eversman (1982: 211)
- Peltigera aphthosa (L.) Willd. - McCune (1982: 19), Thomson (1984: 329)
- Peltigera aphthosa var. leucophlebia Nyl. - Thomson (1984: 330)
- Peltigera canina (L.) Willd. - McCune (1982: 19)
- Peltigera canina (L.) Willd. f. sorediata Schaer. - Thomson (1984: 332)
- Peltigera canina (L.) Willd. var. rufescesns (Weis.) Mudd - Thomson (1984: 333)
- Peltigera collina (Ach.) Schrad. - McCune (1982: 19), Thomson (1984: 334)
- Peltigera elisabethae Gyeln. - McCune (1982: 19)
- Peltigera horizontalis (Huds.) Baumg. - Thomson (1984: 337)
- Peltigera lepidophora (Nyl.) Vain. - Thomson (1984: 338)
- Peltigera leucophlebia (Nyl.) Gyeln. - McCune (1982: 19)
- Peltigera malacea (Ach.) Funck. - McCune (1982: 19), Thomson (1984: 339)
- Peltigera membranacea (Ach.) Nyl. - Thomson (1984: 340)
- Peltigera polydactyla (Neck.) Hoffm. - Thomson (1984: 343)
- Peltigera praetextata (Somm.) Zopf - McCune (1982: 19)
- Peltigera rufescens (Weis) Humb. - McCune (1982: 19)
- Peltigera scabrosa Th. Fr. - Thomson (1984: 344)
- Peltigera spuria (Ach.) DC. - McCune (1982: 19)
- Peltigera venosa (L.) Baumg. - McCune (1982: 19), Thomson (1984: 345)
- Pertusaria amara (Ach.) Nyl. - McCune (1982: 19)
- Pertusaria ophthalmiza (Nyl.) Nyl. - McCune (1982: 19), Hauck & Spribille (2005: 552)
- Pertusaria stenhammari Hellb. - McCune (1982: 19), Hauck & Spribille (2005: 552)
- Phaeocalicium compressulum (Nyl. ex Vainio) Schmidt - McCune (1982: 19), Thomson (1997: 465)
- Phaeophyscia constipata (Norrl. & Nyl.) - McCune (1982: 19), Thomson (1984: 347)
- Phaeophyscia decolor (Kashi.) Essl. - McCune (1982: 19)
- Phaeophyscia endococcinea (Körb.) Moberg - Thomson (1984: 348)
- Phaeophyscia sciastra (Ach.) Moberg - McCune (1982: 19), Thomson (1984: 349)
- Phaeorrhiza nimbosa (Fr.) Mayrh. & Poelt - Thomson (1997: 467)
- Phaeorrhiza sareptana (Tomin) Mayrh. & Poelt - Thomson (1997: 468)
- Physcia adscendens (Fr.) Oliv. - McCune (1982: 19), Eversman (1982: 211), Thomson (1984: 352)
- Physcia aipolia (Humb.) Fürnrohr. - McCune (1982: 19), Thomson (1984: 353)
- Physcia caesia (Hoffm.) Fürnrohr. - McCune (1982: 19), Thomson (1984: 354)
- Physcia dubia (Hoffm.) Lettau - McCune (1982: 19), Thomson (1984: 355)
- Physcia phaea (Tuck.) Thoms. - McCune (1982: 19)
- Physcia semipinnata (Gmel.) Moberg - McCune (1982: 19)
- Physcia stellaris (L.) Nyl. - McCune (1982: 19), Eversman (1982: 211)
- Physconia detersa (Nyl.) Poelt - Thomson (1984: 359)
- Physconia muscigena (Ach.) Poelt - McCune (1982: 19), Thomson (1984: 360)
- Placynthiella oligotropha (J. R. Laundon) Coppins & James - Thomson (1997: 474)
- Placynthiella uliginosa (Schrad.) Coppins & James - Thomson (1997: 475)
- Platismatia glauca (L.) W.L. Culb. & C.F. Culb. - McCune (1982: 19), Eversman (1982: 211), Thomson (1984: 368), Hauck & Spribille (2005: 552)
- Platismatia wheeleri Goward, Altermann & Björk - Lumbsch et al. (2011: 99 Type in Vancouver, British Columbia, Canada UBC)
- Pleopsidium chlorophanum (Wahlenb. ex Ach.) Zopf - McCune (1982: 16 as Acarospora chlorophana), Thomson (1997: 22 as Acarospora chlorophana)
- Polycauliona candelaria (L.) Frödén, Arup & Søchting - McCune (1982: 20 as Xanthoria candelaria), Thomson (1984: 483 as Xanthoria candelaria)
- Polycauliona polycarpa (Hoffm.) Frödén, Arup & Søchting - McCune (1982: 20 as Xanthoria polycarpa), Eversman (1982: 211 as Xanthoria polycarpa), Thomson (1984: 487 as Xanthoria polycarpa)
- Polychidium muscicola (Sw.) S. Gray - McCune (1982: 19)
- Polysporina simplex (Davis) Vezda - Thomson (1997: 486)
- Popidia pseudomelinodes Schwab - Thomson (1997: 495)
- Protoblastenia rupestris (Scop.) Steiner - Thomson (1997: 503)
x
- Pseudephebe minuscula (Nyl. ex Arnold) Brodo & D. Hawksw. - Imshaug (1957: as Alecotria minuscula), Thomson (1984: 373)
x - Pseudephebe pubescens (L.) M. Choisy - Imshaug (1957: as Alectoria pubescens), Bamberg & Major (1968: as Alectoria pubescens), McCune (1977: as Alectoria pubescens), Thomson (1984: 374)
x
- Psora decipiens (Hedwig) Hoffm. - Thomson (1997: 507)
- Psora globifera (Ach.) A. Massal. - Thomson (1997: 508)
- Psora himalayana (Bab.) Timdal - Thomson (1997: 507)
- Psora nipponica (Zahlbr.) Schneider - McCune (1982: 19), Thomson (1997: 510)
- Psora rubiformis (Ach.) Hook. - McCune (1982: 19)
- Psoroma hypnorum (Vahl) Gray - McCune (1982: 19), Thomson (1984: 375)
x
- Pycnora sorophora (Vain.) P. James & Poelt - Hauck & Spribille (2005: 551 as Hypocenomyce sorophora)
- Pyrrhospora gowardiana Spribille & Hauck - Spribille & Hauck (2003: 560 Type in Ottawa, Ontario CANL)
- Ramalina obtusata (Arnold) Bitt. - McCune (1982: 19)
- Ramalina pollinaria (Westr.) Ach. - McCune (1982: 19),
- Ramalina thrausta (Ach.) Nyl. - McCune (1982: 19), Thomson (1984: 382)
- Ramboldia cinnabarina (Sommerf.) Kalb, Lumbsch & Elix - Hauck & Spribille (2005: 552 as Pyrrhospora cinnabarina)
- Rhizocarpon bolanderi (Tuck.) Herre - Thomson (1997: 526)
- Rhizocarpon concentricum (Davis) Beltram. - Thomson (1997: 529)
- Rhizocarpon disporum (Naeg. ex Hepp) Müll. Arg. - McCune (1982: 19)
- Rhizocarpon geminatum Körb. - McCune (1982: 19), Thomson (1997: 537)
- Rhizocarpon geographicum (L.) DC. - Thomson (1997: 538)
- Rhizocarpon grande (Flörke ex Flot.) Arnold - McCune (1982: 19), Thomson (1997: 539)
- Rhizocarpon intermediellum Räsänen - Thomson (1997: 542)
- Rhizocarpon macrosporum Räsänen - Thomson (1997: 543)
- Rhizocarpon polycarpum (Hepp) Th. Fr. - Thomson (1997: 546)
- Rhizocarpon riparium Räsänen - McCune (1982: 19), Thomson (1997: 548)
- Rhizocarpon superficiale (Schaerer) Vain. - Thomson (1997: 551)
- Rhizoplaca chrysoleuca (Sm.) Zopf - Thomson (1997: 554)
- Rhizoplaca melanophthalma (Ramond) Leuck. & Poelt - McCune (1982: 19), Thomson (1997: 555)
- Rhizoplaca peltata (Ramond) Leuckert & Poelt - Thomson (1997: 555)
- Rinodina archaea (Ach.) Arnold - McCune (1982: 19)
- Rinodina aurantiaca Sheard - Sheard & Mayrhofer (2002: 653)
- Rinodina exigua (Ach.) S. Gray - McCune (1982: 19)
- Rinodina milvina (Wahl. ex Ach.) Th. Fr. - McCune (1982: 19)
- Rinodina pyrina (Ach.) Arnold - McCune (1982: 19)
- Rinodina turfacea Wahl. ex Ach. - McCune (1982: 19)
x
- Rusavskia elegans (Link) S. Y. Kondr. & Kärnefelt - McCune (1982: 20 as Xanthoria elegans), Thomson (1984: 484 as Xanthoria elegans)
x - Rusavskia sorediata (Vain.) S. Y. Kondr. & Kärnefelt - McCune (1982: 20 as Xanthoria sorediata)
- Sarcogyne regularis Körb. - Thomson (1997: 579)
- Solorina crocea (L.) Ach. - Thomson (1984: 387)
- Solorina octospora (Arn.) Arn. - Thomson (1984: 389)
- Sporastatia testudinea (Ach.) A. Massal. - Thomson (1997: 589)
- Staurothele areolata (Ach.) Lettau - Thomson (1997: 592)
- Staurothele drummondii (Tuck.) Tuck. - Thomson (1997: 595)
- Staurothele fissa (Tayler) Zwackh. - Thomson (1997: 596)
- Stereocaulon alpinum Laur. - McCune (1982: 20), Thomson (1984: 400)
- Stereocaulon glareosum (Sav.) Magn. - McCune (1982: 20), Thomson (1984: 412)
- Stereocaulon tomentosum E. Fries - Thomson (1984: 428)
x
- Tetramelas papillatus (Somm.) Tuck. - McCune (1982: 17 as Buellia papillata)
x - Tetramelas terricolus (Flörke ex Sommerf.) Lynge - Thomson (1997: 133 erroneously as Buellia geophila)
x
- Thamnolia subuliformis (Ehrh.) W. L. Culb. - Thomson (1984: 438)
x
- Thrombium epigaeum (Pers.) Wallr. - McCune (1982: 20), Thomson (1997: 610)
x
- Toninia aromatica (Turn.) A. Massal. - McCune (1982: 20)
- Toninia caeruleonigricans (Lightf.) Th. Fr. - McCune (1982: 20)
- Toninia candida (W. A. Weber) Th. Fr. - McCune (1982: 20), Thomson (1997 :614)
x
- Trapeliopsis granulosa (Hoffm.) Lumbsch - Thomson (1997: 624)
x
- Tremolecia atrata (Ach.) Hertel - Thomson (1997: 627)
x
- Tuckermannopsis chlorophylla (Willd.) Hale - McCune (1982: 17 as Cetraria chlorophylla), Eversman (1982: 211 as Cetraria chlorophylla), Thomson (1984: 73 as Cetraria chlorophylla), Hauck & Spribille (2005: 552)
x - Tuckermannopsis orbata (Nyl.) M. J. Lai - Spribille (2002: 21)
x
- Umbilicaria decussata (Vill.) Zahlbr. - Thomson (1984: 288 as Omphalodiscus decussatus)
x - Umbilicaria deusta (L.) Baumg. - McCune (1982: 20), Thomson (1984: 449)
x - Umbilicaria hirsuta (Sw. ex Westr.) Ach. - Thomson (1984: 452)
x - Umbilicaria hyperborea (Ach.) Hoffm. var. hyperborea - McCune (1982: 20), Thomson (1984: 453)
x - Umbilicaria phaea Tuck. - McCune (1982: 20), Thomson (1984: 455)
x - Umbilicaria polyphylla (L.) Baumg. - McCune (1982: 20), Thomson (1984: 457)
x - Umbilicaria proboscidea (L.) Schrad. - Thomson (1984: 458)
x - Umbilicaria torrefacta (Lightf.) Schrad. - McCune (1982: 20), Thomson (1984: 459)
x - Umbilicaria vellea (L.) Ach. - McCune (1982: 20), Thomson (1984: 460)
x
- Usnea cavernosa Tuck. - Thomson (1984: 463)
x - Usnea fulvoreagens (Räsänen) Räsänen - Eversman (1982: 211)
x - Usnea glabrata (Ach.) Vain. - Thomson (1984: 466)
- Usnea hirta (L.) F. H. Wigg. - McCune (1982: 20), Eversman (1982: 211), Thomson (1984: 466)
- Usnea scabrata Nyl. - McCune (1982: 20)
- Usnea scabrata Nyl. subsp. nylanderiana Mot. - McCune (1982: 20)
- Usnea sorediifera (Arnold) Lynge - McCune (1982: 20)
- Usnea subfloridana Stirt. - Thomson (1984: 469)
- Usnea substerilis Mot. - Thomson (1984: 470)
x
- Verrucaria margacea (Wahlenb. in Ach.) Wahlenb. - Thomson (1997: 639)
- Verrucaria muralis Ach. - McCune (1982: 20)
- Verrucaria nigrescens Pers. - Thomson (1997: 642)
x
- Vulpicida canadensis (Räsänen) Räsänen - McCune (1982: 17 as Cetraria canadensis)
- Vulpicida pinastri (Scop.) J.-E. Mattsson & M. J. Lai - McCune (1982: 17 as Cetraria pinastri), Eversman (1982: 211), Thomson (1984: 93 as Cetraria pinastri), Hauck & Spribille (2005: 552)
x - Vulpicida tilesii (Ach.) J.-E. Mattsson & M. J. Lai - Thomson (1984: 95 as Cetraria tilesii), Glew (1994: 83)
- Xanthoparmelia chlorochroa (Tuck.) Hale - Thomson (1984: 477)
- Xanthoparmelia cumberlandia (Gyeln.) Hale - McCune (1982: 20)
- Xanthoparmelia mougeotii (Flot.) Hale - Anderson (1967: 341 as Parmelia mougeotii)
- Xanthoparmelia plittii (Gyeln.) Hale - McCune (1982: 20)
- Xanthoparmelia taractica (Kremp.) Hale - Thomson (1984: 480)
- Xanthomendoza fallax (Hepp ex Arnold) Søchting, Kärnefelt & S. Y. Kondr. - Eversman (1982: 211), Thomson (1984: 486)
- Xylographa vitiligo (Ach.) J. R. Laundon - Anderson (1967: 342), Thomson (1997: 647)
x
- Xylopsora friesii (Ach.) Bendiksby & Timdal - McCune (1982: 18 as Hypocenomyce friesii), Thomson (1997: 247 as Hypocenomyce friesii), Hauck & Spribille (2005: 551 as Hypocenomyce friesii)