Checklist of lichens of Idaho (USA)
Version 31 December 2018
- Acarospora fuscata (Schrad.) Arnold - Rosentreter (2008 Internet)
- Acarospora fuscescens H. Magn. - Knudsen (2008: 83)
- Acarospora glaucocarpa (Ach.) Körb. - Rosentreter (2008 Internet)
- Acarospora nodulosa (Dufour) Hue var. nodulosa - Rosentreter (2008 Internet as Acarospora geogena), Rosentreter (2008 Internet)
- Acarospora schleicheri (Ach.) A. Massal. - Thomson (1997: 33), Rosentreter (2008 Internet)
- Acarospora strigata (Nyl.) Jatta - Rosentreter (2008 Internet)
- Ahtiana pallidula (Tuck. ex Riddle) Goward & A. Thell - Rosentreter (2008 Internet)
- Ahtiana sphaerosporella (Müll. Arg.) Goward - Anderegg et al. (1973: 207 as Parmelia sphaerosporella), Rosentreter (2008 Internet)
- Alectoria imshaugii Brodo & D. Hawksw. - Brodo & Hawksworth (1977: 59 Type in xx), Rosentreter (2008 Internet)
- Alectoria sarmentosa (Ach.) Ach. - Rosentreter (2008 Internet)
- Amandinea punctata (Hoffm.) Coppins & Scheid. - Thomson (1997: 138 as Buellia punctata), Rosentreter (2008 Internet)
- Anaptychia ulothricoides (Vain.) Vain. - Rosentreter (2008 Internet as 'ulotricoides')
- Arthonia glebosa Tuck. - Rosentreter (2008 Internet)
- Arthonia punctiformis
Ach. - Rosentreter (2008 Internet)
- Arthrorhaphis citrinella (Ach.) Poelt - Rosentreter (2008 Internet)
- Aspicilia albomarginata B. de Lesd. - Rosentreter (2008 Internet)
- Aspicilia cinerea (L.) Körb. - Thomson (1997: 68), Rosentreter (2008 Internet)
- Aspicilia filiformis Rosentr. - Rosentreter (2008 Internet)
- Aspicilia pergibbosa (H. Magn. ex Lynge) Räsänen - Rosentreter (2008 Internet)
- Aspicilia reptans (Looman) Wetmore - Rosentreter (2008 Internet)
- Aspicilia subradians (Nyl.) Hue - Thomson (1997: 94)
- Aspicilia supertegens Arnold - Thomson (1997: 95)
- Athallia holocarpa (Hoffm.) Arup, Frödén & Søchting - Thomson (1997: 164 as Caloplaca holocarpa), Rosentreter (2008 Internet as Caloplaca holocarpa)
- Bacidia idahoensis H. Magn. - Magnusson (1952: 45 Type in Göteborg, Sweden GB), Rosentreter (2008 Internet as Bacidia laurocerasi subsp. idahoensis)
- Baeomyces rufus (Huds.) Rebent. - Rosentreter (2008 Internet)
- Bellemerea alpina (Sommerf.) Clauzade & Cl. Roux - Thomson (1997: 115), Rosentreter (2008 Internet)
- Bilimbia lobulata (Sommerf.) Hafellner & Coppins - Rosentreter (2008 Internet as Mycobilimbia lobulata)
- Blastenia ammiospila (Ach.) Arup, Søchting & Frödén - Rosentreter (2008 Internet as Caloplaca ammiospila)
- Blastenia ferruginea (Huds.) A. Massal. - Rosentreter (2008 Internet as Caloplaca ferruginea)
- Blastenia fraudans (Th. Fr.) B. de Lesd. - Thomson (1997: 162 as Caloplaca fraudans), Rosentreter (2008 Internet as Caloplaca fraudans)
- Blennothallia crispa (Hudson) Otálora, P. M. Jørg. & Wedin - Rosentreter (2008 Internet as Collema crispum)
- Brodoa oroarctica (Krog) Goward - Anderegg et al. (1973: 207 erroneously as Hypogymnia intestiniformis), Rosentreter (2008 Internet)
- Bryoplaca jungermanniae (Vahl) Søchting, Frödén & Arup - Thomson (1997: 166 as Caloplaca jungermanniae), Rosentreter (2008 Internet as Caloplaca jungermanniae)
- Bryoria capillaris (Ach.) Brodo & D. Hawksw. - Thomson (1984: 55), Rosentreter (2008 Internet)
- Bryoria fremontii (Tuck.) Brodo & D. Hawksw. - Rosentreter (2008 Internet), Rosentreter (2008 Internet as Bryoria tortuosa)
- Bryoria fuscescens (Gyeln.) Brodo & D. Hawksw. - Thomson (1984: 57), Thomson (1984: 59 erroneously as Bryoria lanestris), Rosentreter (2008 Internet erroneously as Bryoria chalybeiformis), Rosentreter (2008 Internet), Rosentreter (2008 Internet erroneously as Bryoria lanestris)
- Bryoria glabra (Motyka) Brodo & D. Hawksw. - Thomson (1984: 58), Rosentreter (2008 Internet)
- Bryoria pseudofuscescens (Gyeln.) Brodo & D. Hawksw. - Thomson (1984: 63)
- Bryoria simplicior (Vain.) Brodo & D. Hawksw. - Thomson (1984: 65), Rosentreter (2008 Internet)
- Bryoria trichodes (Michx.) Brodo & D. Hawksw. subsp. trichodes - Thomson (1984: 68), Rosentreter (2008 Internet)
- Buellia badia (Fr.) A. Massal. - Rosentreter (2008 Internet)
- Buellia dispersa A. Massal. - Rosentreter (2008 Internet)
- Buellia elegans Poelt - Rosentreter (2008 Internet)
- Buellia epigaea (Hoffm.) Tuck. - Rosentreter (2008 Internet)
- Buellia erubescens Arnold - Thomson (1997: 131), Rosentreter (2008 Internet)
- Calicium abietinum Pers. - Thomson (1997: 143), Rosentreter (2008 Internet)
- Calicium corynellum (Ach.) Ach. - Rosentreter (2008 Internet)
- Calicium salicinum Pers. - Thomson (1997: 144) Rosentreter (2008 Internet)
- Calicium viride Pers. - Thomson (1997: 146) Rosentreter (2008 Internet)
- Calogaya decipiens (Arnold) Arup, Frödén & Søchting - Rosentreter (2008 Internet as Caloplaca decipiens)
- Calogaya lobulata (Flörke) Arup, Frödén & Søchting - Rosentreter (2008 Internet as Caloplaca lobulata)
- Caloplaca atroalba (Tuck.) Zahlbr. - Rosentreter (2008 Internet)
- Caloplaca cerina (Hedw.) Th. Fr. -Thomson (1997: 154), Rosentreter (2008 Internet)
- Caloplaca demissa (Flot. ex Körb.) Arup & Grube - Rosentreter (2008 Internet)
- Caloplaca epithallina Lynge - Rosentreter (2008 Internet)
- Caloplaca saxicola (Hoffm.) Nordin - Thomson (1997: 169), Rosentreter (2008 Internet)
- Caloplaca stillicidiorum (Vahl) Lynge - Thomson (1997: 172), Rosentreter (2008 Internet)
- Caloplaca subpyraceella (Nyl. ex Hasse) Zahlbr. - Rosentreter (2008 Internet)
- Candelaria concolor (Dicks.) Arnold - Rosentreter (2008 Internet)
- Candelariella aurella (Hoffm.) Zahlbr. - Thomson (1997: 182), Rosentreter (2008 Internet)
- Candelariella citrina B. de Lesd. - Anderegg et al. (1973: 207 as Candelariella terrigena), Thomson (1997: 187 as Candelariella terrigena), Rosentreter (2008 Internet), Rosentreter (2008 Internet as Candelariella terrigena)
- Candelariella efflorescens R. C. Harris & W. R. Buck - Rosentreter (2008 Internet)
- Candelariella rosulans (Müll. Arg.) Zahlbr. - Anderegg et al. (1973: 207), Rosentreter (2008 Internet)
- Candelariella vitellina (Hoffm.) Müll. Arg. - Rosentreter (2008 Internet)
- Carbonicola myrmecina (Ach.) Bendiksby & Timdal - Rosentreter (2008 Internet as Hypocenomyce castaneocinerea)
- Catapyrenium cinereum (Pers.) Körb. - Rosentreter (2008 Internet)
- Catapyrenium lachneum (Ach.) R. Sant. - Thomson (1984: 217 as Dermatocarpon lachneum), Rosentreter (2008 Internet as Placidium lachneum)
- Catinaria atropurpurea (Schaer.) Vezda & Poelt - Thomson (1997: 200) - Rosentreter (2008 Internet)
- Cetraria aculeata (Schreb.) Fr. - Rosentreter (2008 Internet)
- Chaenotheca brunneola (Ach.) Müll. Arg. - Rosentreter (2008 Internet)
- Chaenotheca furfuracea (L.) Tibell - Rosentreter (2008 Internet)
- Chrysothrix chlorina (Ach.) J. R. Laundon - Rosentreter (2008 Internet)
- Circinaria arida Owe-Larsson, A. Nordin & Tibell - Rosentreter (2008 Internet erroneously as Aspicilia desertorum)
- Circinaria aspera (Mereschk.) Sohrabi & Senkard. - Rosentreter (2008 as Aspicilia aspera Internet)
- Circinaria caesiocinerea (Nyl. ex Malbr.) A. Nordin, Savic & Tibell - Thomson (1997: 65 as Aspicilia caesiocinerea), Rosentreter (2008 Internet as Aspicilia caesiocinerea)
- Circinaria calcarea (L.) A. Nordin, Savic & Tibell - Rosentreter (2008 Internet as Aspicilia calcarea)
- Circinaria contorta (Hoffm.) A. Nordin, Savic & Tibell - Rosentreter (2008 Internet as Aspicilia contorta)
- Circinaria hispida (Mereschk.) A. Nordin, Savic & Tibell - Rosentreter (Checklist as Aspicilia hispida)
- Circinaria rogeri (Sohrabi) Sohrabi - Rosentreter (2008 Internet erroneously as Aspicilia fruticulosa)
- Cladonia arbuscula (Wallr.) Flot. subsp. arbuscula - Rosentreter (2008 Internet)
- Cladonia bacillaris (Ach.) Nyl. - Thomson (1984: 111), Rosentreter (2008 Internet)
- Cladonia borealis S. Stenroos - Rosentreter (2008 Internet)
- Cladonia cariosa (Ach.) Spreng. - Thomson (1984: 116), Rosentreter (2008 Internet)
- Cladonia carneola (Fr.) Fr. - Thomson (1984: 117), Rosentreter (2008 Internet)
- Cladonia cenotea (Ach.) Schaer. - Thomson (1984: 118) - Rosentreter (2008 Internet)
- Cladonia cervicornis (Ach.) Flot. subsp. cervicornis - Rosentreter (2008 Internet)
- Cladonia chlorophaea ( Flörke ex. Sommerf.) Spreng. - Thomson (1984: 119), Rosentreter (2008 Internet)
- Cladonia coccifera (L.) Willd. - Rosentreter (2008 Internet)
- Cladonia coniocraea (Flörke) Spreng. - Thomson (1984: 122), Rosentreter (2008 Internet)
- Cladonia cornuta (L.) Hoffm. subsp. cornuta - Thomson (1984: 124), Rosentreter (2008 Internet)
- Cladonia digitata (L.) Hoffm. - Thomson (1984: 131), Rosentreter (2008 Internet)
- Cladonia ecmocyna Leight. subsp. ecmocyna - Thomson (1984: 132), Rosentreter (2008 Internet)
- Cladonia fimbriata (L.) Fr. - Thomson (1984: 133), Thomson (1984: 144 as Cladonia major), Rosentreter (2008 Internet), Rosentreter (2008 Internet as Cladonia major)
- Cladonia furcata (Hudson) Schrad. - Rosentreter (2008 Internet)
- Cladonia gracilis (L.) Willd. subsp. gracilis - Rosentreter (2008 Internet)
- Cladonia incrassata Flörke - Rosentreter (2008 Internet)
- Cladonia mitis Sandst. - Rosentreter (2008 Internet)
- Cladonia multiformis G. Merr. - Thomson (1984: 149) - Rosentreter (2008 Internet)
- Cladonia ochrochlora Flörke - Rosentreter (2008 Internet)
- Cladonia phyllophora Hoffm. - Anderegg et al. (1973: 207), Rosentreter (2008 Internet)
- Cladonia pleurota (Flörke) Schaer. - Thomson (1984: 154), Rosentreter (2008 Internet)
- Cladonia pocillum (Ach.) O. J. Rich. - Rosentreter (2008 Internet)
- Cladonia pyxidata (L.) Hoffm. - Thomson (1984: 158), Rosentreter (2008 Internet)
- Cladonia ramulosa (With.) J. R. Laundon - Thomson (1984: 109 as Cladonia anomaea), Rosentreter (2008 Internet as Cladonia anomaea), Rosentreter (2008 Internet)
- Cladonia rangiferina (L.) F. H. Wigg. - Rosentreter (2008 Internet)
- Cladonia subulata (L.) F. H. Wigg. - Thomson (1984: 168), Rosentreter (2008 Internet)
- Cladonia sulphurina (Michx.) Fr. - Rosentreter (2008 Internet)
- Cladonia umbricola Tønsberg & Ahti - Rosentreter (2008 Internet)
- Cladonia uncialis (L.) Weber ex F. H. Wigg.- Rosentreter (2008 Internet)
- Cladonia verruculosa (Vainio) Ahti - Rosentreter (2008 Internet)
- Cladonia verticillata (Hoffm.) Schaer. - Anderegg et al. (1973: 207), Rosentreter (2008 Internet)
- Clavascidium lacinulatum (Ach.) M. Prieto var. atrans (Breuss) M. Prieto - Rosentreter (2008 Internet as Placidium lacinulatum var. atrans)
- Clavascidium lacinulatum (Ach.) M. Prieto var. lacinulatum - xx (xx: xx as Placidium lacinulatum)
- Collema curtisporum Degel. - Rosentreter (2008 Internet)
- Collema furfuraceum (Arnold) Du Rietz - Rosentreter (2008 Internet)
- Chaenotheca furfuracea (L.) Tibell - Thomson (1997: 210 as Coniocybe furfuracea), Rosentreter (2008 Internet as Coniocybe furfuracea)
- Cyphelium inquinans (Sm. in Sm. & Sow.) Trevisan - Thomson (1997: 212), Rosentreter (2008 Internet)
- Cyphelium pinicola Tibell - Rosentreter (2008 Internet)
- Cyphelium tigillare (Ach.) Ach. - Thomson (1997: 214), Rosentreter (2008 Internet)
- Dermatocarpon intestiniforme (Körb.) Hasse - Rosentreter (2008 Internet)
- Dermatocarpon lorenzianum Anders - Rosentreter (2008 Internet)
- Dermatocarpon luridum (With.) J. R. Laundon - Thomson (1984:213 as Dermatocarpon fluviatile), Rosentreter (2008 Internet), Rosentreter (2008 Internet as Dermatocarpon fluviatile)
- Dermatocarpon miniatum (L.) W. Mann - Thomson (1984: 219), Rosentreter (2008 Internet)
- Dermatocarpon reticulatum H. Magn. - Rosentreter (2008 Internet)
- Dermatocarpon rivulorum (Arnold) Dalla Torre & Sarnth. - Rosentreter (2008 Internet)
- Dimelaena oreina (Ach.) Norman - Rosentreter (2008 Internet)
- Dimelaena thysanota (Tuck.) Hale & W. L. Culb. - Rosentreter (2008 Internet)
- Diploschistes gypsaceus (Ach.) Zahlbr. - Rosentreter (2008 Internet)
- Diploschistes muscorum (Scop.) R. Sant. - Thomson (1997: 218), Rosentreter (2008 Internet)
- Diploschistes scruposus (Schreb.) Norman - Thomson (1997: 218), Rosentreter (2008 Internet)
- Diplotomma alboatrum (Hoffm.) Flot. - Rosentreter (2008 Internet)
- Diplotomma epipolium (Ach.) Arnold - Rosentreter (2008 Internet)
- Enchylium coccophorum (Tuck.) Otálora, P. M. Jørg. & Wedin - Rosentreter (2008 Internet as Collema coccophorum)
- Enchylium substellatum (H. Magn.) P. M. Jørg. - Rosentreter (2008 Internet as Collema tenax var. substellatum)
- Enchylium tenax (Sw.) Gray - Rosentreter (2008 Internet as Collema tenax)
- Staurothele pulvinata Th. Fr. - Rosentreter (2008 Internet as Endocarpon pulvinatum)
- Endocarpon pusillum Hedw. - Rosentreter (2008 Internet)
- Endocarpon tortuosum Herre - Rosentreter (2008 Internet)
- Ephebe perspinulosa Nyl. - Rosentreter (2008 Internet)
- Esslingeriana idahoensis (Essl.) Hale & M. J. Lai - Esslinger (1971: 366 as Cetraria idahoensis), Rosentreter (2008 Internet)
- Evernia prunastri (L.) Ach. - Rosentreter (2008 Internet)
- Flavoplaca citrina (Hoffm.) Arup, Frödén & Søchting - Rosentreter (2008 Internet as Caloplaca citrina)
- Flavopunctelia flaventior (Stirton) Hale - Rosentreter (2008 Internet)
- Flavopunctelia soredica (Nyl.) Hale - Rosentreter (2008 Internet)
- Fuscopannaria cyanolepra (Tuck.) P. M. Jørg. - Rosentreter (2008 Internet), Rosentreter (2008 as Parmeliella cyanolepra Internet)
- Fuscopannaria leucostictoides (Ohlsson) P. M. Jørg. - Rosentreter (2008 Internet)
- Fuscopannaria pacifica P. M. Jørg. - Rosentreter (2008 Internet)
- Fuscopannaria praetermissa (Nyl.) P. M. Jørg. - Thomson (1984: 320 as Parmeliella praetermissa), Rosentreter (2008 Internet)
- Gallowayella fulva (Hoffm.) S. Y. Kondr., Fedorenko, S. Stenroos, Kärnefelt, Elix, J. S. Hur & A. Thell - Rosentreter (2008 as Xanthomendoza fulva Internet)
- Glypholecia scabra (Pers.) Müll. Arg. - Rosentreter (2008 Internet)
- Gyalolechia bracteata (Hoffm.) A. Massal. subsp. bracteata - Thomson (1997: 228 as Fulgensia bracteata), Rosentreter (2008 Internet as Fulgensia bracteata)
- Gyalolechia desertorum (Tomin) Søchting, Frödén & Arup - Rosentreter (2008 Internet as Fulgensia desertorum)
- Gyalolechia fulgens (Sw.) Søchting, Frödén & Arup - Rosentreter (2008 Internet as Fulgensia fulgens)
- Heppia lutosa (Ach.) Nyl. - Rosentreter (2008 Internet)
- Heteroplacidium congestum (Breuss & McCune) Breuss - Rosentreter (2008 Internet)
- Ionaspis lacustris (With.) Lutzoni - Thomson (1997: 245 as Hymenelia lacustris), Rosentreter (2008 Internet as Hymenelia lacustris)
- Hypocenomyce scalaris (Ach. ex Lilj.) M. Choisy - Thomson (1997: 248), Rosentreter (2008 Internet)
- Hypogymnia apinnata Goward & McCune - Rosentreter (2008 Internet)
- Hypogymnia austerodes (Nyl.) Räsänen - Rosentreter (2008 Internet)
- Hypogymnia enteromorpha (Ach.) Nyl. - Rosentreter (2008 Internet)
- Hypogymnia imshaugii Krog - Rosentreter (2008 Internet)
- Hypogymnia occidentalis L. Pike - Rosentreter (2008 Internet)
- Hypogymnia physodes (L.) Nyl. - Thomson (1984: 241), Rosentreter (2008 Internet)
- Hypogymnia rugosa (G. Merr.) L. Pike - Rosentreter (2008 Internet)
- Hypogymnia tubulosa (Schaer.) Hav. - Rosentreter (2008 Internet)
- Icmadophila ericetorum (L.) Zahlbr. - Thomson (1997: 249), Rosentreter (2008 Internet)
- Japewia tornoensis Nyl. - Thomson (1997: 387 as Lecidea tornoensis), Rosentreter (2008 Internet as Lecidea tornoensis)
- Kaernefeltia merrillii (Du Rietz) A. Thell & Goward - Rosentreter (2008 Internet)
- Lecanora albellula Nyl. - Thomson (1997: 299 as Lecanora piniperda), Rosentreter (2008 Internet as Lecanora piniperda), Rosentreter (2008 Internet)
- Lecanora argopholis (Ach.) Ach. - Thomson (1997: 267), Rosentreter (2008 Internet)
- Lecanora cenisia Ach. - Thomson (1997: 272), Rosentreter (2008 Internet)
- Lecanora chlarotera Nyl. - Thomson (1997: 273), Rosentreter (2008 Internet), Rosentreter (2008 Internet as Lecanora rugosella)
- Lecanora circumborealis Brodo & Vitik. - Thomson (1997: 274), Rosentreter (2008 Internet)
- Lecanora crenulata Hook. - Rosentreter (2008 Internet)
- Lecanora epibryon (Ach.) Ach. - Thomson (1997: 279), Rosentreter (2008 Internet)
- Lecanora flowersiana H. Magn. - Rosentreter (2008 Internet)
- Lecanora fuscescens (Sommerf.) Nyl. - Thomson (1997: 282), Rosentreter (2008 Internet)
- Lecanora garovaglioi (Körb.) Zahlbr. - Rosentreter (2008 Internet)
- Lecanora hagenii (Ach.) Ach. - Rosentreter (2008 Internet)
- Lecanora intricata (Ach.) Ach. - Thomson (1997: 288), Rosentreter (2008 Internet)
- Lecanora muralis (Schreb.) Rabenh. var. muralis - Thomson (1997: 295), Rosentreter (2008 Internet)
- Lecanora phaedrophthalma Poelt var. phaedrophthalma - Rosentreter (2008 Internet)
- Lecanora phaedrophthalma Poelt var. christoi (W. A. Weber) B. D. Ryan - Rosentreter (2008 Internet)
- Lecanora polytropa (Ehrh. in Hoffm.) Rabenh. - Thomson (1997: 299), Rosentreter (2008 Internet)
- Lecanora pringlei (Tuck.) I. M. Lamb. - Rosentreter (2008 Internet)
- Lecanora pseudomellea B. D. Ryan - Rosentreter (2008 Internet)
- Lecanora pulicaris (Pers.) Ach. - Thomson (1997: 301), Rosentreter (2008 Internet)
- Lecanora reagens Norman - Rosentreter (2008 Internet)
- Lecanora rupicola (L.) Zahlbr. - Thomson (1997: 303), Rosentreter (2008 Internet)
- Lecanora salicicola H. Magn. - Thomson (1997: 304), Rosentreter (2008 Internet)
- Lecanora subrugosa Nyl. - Thomson (1997: 308), Rosentreter (2008 Internet)
- Lecanora symmicta (Ach.) Ach. - Thomson (1997: 309), Rosentreter (2008 Internet)
- Lecanora varia (Hoffm.) Ach. - Thomson (1997: 311), Rosentreter (2008 Internet)
- Lecanora zosterae (Ach.) Nyl. var. zosterae - Rosentreter (2008 Internet)
- Lecidea atrobrunnea (Ram. ex Lam. & DC.) Schaer. subsp. atrobrunnea - Thomson (1997: 327), Rosentreter (2008 Internet)
- Lecidea auriculata Th. Fr. subsp. auriculata - Thomson (1997: 329), Rosentreter (2008 Internet)
- Lecidea fuscoatra (L.) Ach. - Rosentreter (2008 Internet)
- Lecidea laboriosa Müll. Arg. - Rosentreter (2008 Internet)
- Lecidea lithophila (Ach.) Ach. - Thomson (1997: 362), Rosentreter (2008 Internet)
- Lecidea perlatolica Hertel & Leuckert - Rosentreter (2008 Internet)
- Lecidea plana (J. Lahm) Nyl. - Rosentreter (2008 Internet)
- Lecidea tessellata Flörke - Thomson (1997: 384), Rosentreter (2008 Internet)
- Lecidella carpathica Körb. - Thomson (1997: 395), Rosentreter (2008 Internet)
- Lecidella elaeochroma (Ach.) M. Choisy - Thomson (1997: 396), Rosentreter (2008 Internet)
- Lecidella euphorea (Flörke) Hertel - Thomson (1997: 398), Rosentreter (2008 Internet)
- Lecidella patavina (A. Massal.) Knoph & Leuckert - Thomson (1997: 399 as Lecidella inamoena), Rosentreter (2008 Internet as Lecidella inamoena)Rosentreter (2008 Internet)
- Lecidella stigmatea (Ach.) Hertel & Leuck. - Thomson (1997: 402), Rosentreter (2008 Internet)
- Lecidoma demissum (Rutstr.) Gotth. Schneider & Hertel - Rosentreter (2008 Internet)
- Lepraria finkii (B. de Lesd.) R. C. Harris - Rosentreter (2008 Internet erroneously as Lepraria lobificans)
- Lepraria membranacea (Dicks.) Vain.- Rosentreter (2008 Internet)
- Lepraria neglecta (Nyl.) Lettau - Anderegg et al. (1973: 207), Rosentreter (2008 Internet), Rosentreter (2008 Internet as Lepraria alpina), Rosentreter (2008 Internet as Lepraria caesioalba)
- Lepraria subalbicans (I. M. Lamb) Lendemer & Hodkinson - Rosentreter (2008 Internet as Leprocaulon subalbicans)
- Lepraria vouauxii (Hue) R. C. Harris - Rosentreter (2008 Internet)
- Leptochidium albociliatum (Desm.) M. Choisy - Rosentreter (2008 Internet)
- Leptogium burnetiae C. W. Dodge - Rosentreter (2008 Internet)
- Leptogium pseudofurfuraceum P. M. Jørg. & Wallace - Rosentreter (2008 Internet)
- Leptogium saturninum (Dicks.) Nyl. - Rosentreter (2008 Internet)
- Letharia columbiana (Nutt.) J. W. Thomson - Rosentreter (2008 Internet)
- Letharia vulpina (L.) Hue - Rosentreter (2008 Internet)
- Lichinella stipatula Nyl. - Rosentreter (2008 Internet)
- Lobaria anthraspis (Ach.) T. Sprib. & McCune - Rosentreter (2008 Internet as Pseudocyphellaria anthraspis)
- Lobaria hallii (Tuck.) Zahlbr. - Thomson (1984: 266), Rosentreter (2008 Internet)
- Lobaria pulmonaria - Rosentreter (2008 Internet)
- Lobaria scrobiculata - Rosentreter (2008 Internet)
- Lobothallia alphoplaca (Wahlenb. in Ach.) Hafellner - Thomson (1997: 59 as Aspicilia alphoplaca), Rosentreter (2008 Internet)
- Lobothallia praeradiosa (Nyl.) Hafellner - Rosentreter (2008 Internet)
- Lobothallia radiosa (Hoffm.) Hafellner - Rosentreter (2008 Internet)
- Lopadium pezizoideum (Ach.) Körb. - Thomson (1997: 411), Rosentreter (2008 Internet)
- Massalongia carnosa (Dicks.) Körb. - Rosentreter (2008 Internet)
- Massalongia microphylliza (Nyl.) Henssen - Rosentreter (2008 Internet)
- Megaspora verrucosa (Ach.) Hafellner & V. Wirth - Anderegg et al. (1973: 207 as Lecanora verrucosa), Rosentreter (2008 Internet), Rosentreter (2008 Internet as Lecanora verrucosa)
- Melanelia commixta (Nyl.) A. Thell - Rosentreter (2008 Internet)
- Melanelia hepatizon (Ach.) A. Thell - Rosentreter (2008 Internet)
- Melanelixia fuliginosa (Fr. ex Duby) O. Blanco, A. Crespo, Divakar, Essl., D. Hawksw. & Lumbsch - Thomson (1984: 303 as Parmelia glabratula), Rosentreter (2008 Internet)
- Melanelixia subargentifera (Nyl.) O. Blanco, A. Crespo, Divakar, Essl., D. Hawksw. & Lumbsch - Rosentreter (2008 Internet)
- Melanelixia subaurifera (Nyl.) O. Blanco, A. Crespo, Divakar, Essl., D. Hawksw. & Lumbsch - Thomson (1984: 316 as Parmelia subaurifera), Rosentreter (2008 Internet)
- Melanohalea elegantula (Zahlbr.) O. Blanco, A. Crespo, Divakar, Essl., D. Hawksw. & Lumbsch - Thomson (1984: 300 as Parmelia elegantula), Rosentreter (2008 Internet)
- Melanohalea exasperatula (Nyl.) O. Blanco et al. - Thomson (1984: 300 as Parmelia exasperatula), Rosentreter (2008 Internet)
- Melanohalea multispora - Rosentreter (2008 Internet)
- Melanohalea subelegantula - Rosentreter (2008 Internet)
- Melanohalea subolivacea - Rosentreter (2008 Internet)
- Montanelia disjuncta (Erichsen) Divakar, A. Crespo, Wedin - Thomson (1984: 299 as Parmelia disjuncta), Rosentreter (2008 Internet)
- Montanelia panniformis (Nyl.) Divakar, A. Crespo, Wedin & Essl. - Thomson (1984: 309 as Parmelia panniformis), Rosentreter (2008 Internet)
- Montanelia sorediata (Ach.) Divakar, A. Crespo, Wedin & Essl. - Thomson (1984: 312 as Parmelia sorediosa), Rosentreter (2008 Internet)
- Multiclavula mucida (Fr.) R. Petersen - Rosentreter (2008 Internet)
- Multiclavula vernalis (Schwein.) R. Petersen - Rosentreter (2008 Internet)
- Mycobilimbia berengeriana (A. Massal.) Hafellner & V. Wirth - Thomson (1997: 331 as Lecidea berengeriana), Rosentreter (2008 Internet as Lecidea berengeriana)
- Mycoblastus affinis (Schaer.) Schauer - Thomson (1997: 424), Rosentreter (2008 Internet)
- Mycoblastus sanguinarius (L.) Norman - Thomson (1997: 426), Rosentreter (2008 Internet)
- Myochroidea porphyrospoda (Anzi) Printzen, T. Sprib. & Tønsberg - Rosentreter (2008 Internet as Biatora porphyrospoda)
- Nephroma helveticum Ach. subsp. helveticum - Rosentreter (2008 Internet)
- Nephroma parile (Ach.) Ach. - Thomson (1984: 282), Rosentreter (2008 Internet)
- Nephroma resupinatum (L.) Ach. - Thomson (1984: 283), Rosentreter (2008 Internet)
- Nodobryoria abbreviata (Müll. Arg.) Common & Brodo - Rosentreter (2008 Internet)
- Nodobryoria oregana (Tuck.) Common & Brodo - Rosentreter (2008 Internet)
- Normandina pulchella (Borrer) Nyl. - Rosentreter (2008 Internet)
- Ochrolechia androgyna (Hoffm.) Arnold - Thomson (1997: 430), Rosentreter (2008 Internet)
- Ochrolechia montana Brodo - Rosentreter (2008 Internet)
- Ochrolechia szatalaensis Verseghy - Rosentreter (2008 Internet)
- Ochrolechia upsaliensis (L.) A. Massal. - Thomson (1997: 436), Rosentreter (2008 Internet)
- Omphalora arizonica (Tuck. ex Willey) T. H. Nash & Hafellner - Rosentreter (2008 Internet)
- Ophioparma lapponica (Räsänen) Hafellner & Rogers - Anderegg et al. (1973: 207 as Haematomma lapponicum), Thomson (1997: 440), Rosentreter (2008 Internet as Haematomma lapponicum)
- Ophioparma rubricosa (Müll. Arg.) S. Ekman - Rosentreter (2008 Internet)
- Oxneria fallax (Arnold) S. Y. Kondr. & Kärnefelt - Thomson (1984: 486 as Xanthoria fallax), Rosentreter (2008 as Xanthomendoza fallax Internet)
- Pannaria conoplea (Ach.) Bory - Rosentreter (2008 Internet)
- Parmelia barrenoae Divakar, M. C. Molina & A. Crespo - Rosentreter (2008 Internet), Hodkinson et al. (2010: 3)
- Parmelia hygrophila Goward & Ahti - Rosentreter (2008 Internet)
- Parmelia saxatilis (L.) Ach. - Thomson (1984: 310), Rosentreter (2008 Internet)
- Parmelia sulcata Taylor - Thomson (1984: 318), Rosentreter (2008 Internet)
- Parmeliopsis ambigua (Wulf.) Nyl. - Thomson (1984: 325), Rosentreter (2008 Internet)
- Parmeliopsis hyperopta (Ach.) Arnold - Thomson (1984: 326), Rosentreter (2008 Internet)
- Parvoplaca tiroliensis (Zahlbr.) Arup, Søchting & Frödén - Rosentreter (2008 Internet as Caloplaca tiroliensis)
- Peccania subnigra (B. de Lesd.) Wetmore - Rosentreter (2008 Internet)
- Peltigera aphthosa (L.) Willd. - Thomson (1984: 329), Rosentreter (2008 Internet)
- Peltigera britannica (Gyelnik) Holt.-Hartw. & Tønsberg - Rosentreter (2008 Internet)
- Peltigera canina (L.) Willd. - Rosentreter (2008 Internet)
- Peltigera collina (Ach.) Schrad. - Thomson (1984: 334), Rosentreter (2008 Internet)
- Peltigera didactyla (With.) J.R. Laundon - Thomson (1984: 332 as Parmelia canina f. sorediata), Rosentreter (2008 as Parmelia canina f. sorediata Internet), Rosentreter (2008 Internet)
- Peltigera horizontalis - Rosentreter (2008 Internet)
- Peltigera lepidophora - Rosentreter (2008 Internet)
- Peltigera leucophlebia (Nyl.) - Thomson (1984: 330 as Peltigera aphthosa var. leucophlebia), Rosentreter (2008 Internet)
- Peltigera malacea (Ach.) Funck. - Thomson (1984: 339), Rosentreter (2008 Internet)
- Peltigera membranacea (Ach.) Nyl. - Thomson (1984: 340), Rosentreter (2008 Internet)
- Peltigera neckeri Hepp ex Müll. Arg. - Rosentreter (2008 Internet)
- Peltigera neopolydactyla (Gyeln.) Gyeln. - Rosentreter (2008 Internet)
- Peltigera polydactylon (Neck.) Hoffm. - Thomson (1984: 343), Rosentreter (2008 Internet)
- Peltigera rufescens (Weiss) Humb. - Thomson (1984: 333 as Peltigera canina var. rufescens), Rosentreter (2008 Internet)
- Peltigera venosa (L.) Baumg. - Thomson (1984: 345), Rosentreter (2008 Internet)
- Peltula euploca (Ach.) Poelt ex Pišút - Rosentreter (2008 Internet)
- Peltula patellata (Bagl.) Swinscow & Krog - Rosentreter (2008 Internet)
- Pertusaria carneopallida (Nyl.) Anzi ex Nyl. - Thomson (1997: 451), Rosentreter (2008 Internet)
- Phaeophyscia constipata (Nyl.) Moberg - Rosentreter (2008 Internet)
- Phaeophyscia endococcina (Körb.) Moberg - Anderegg et al. (1973: 207 as Physcia endococcinea), Thomson (1984: 348), Rosentreter (2008 Internet), Rosentreter (2008 Internet as Physcia endococcinea)
- Phaeophyscia nigricans (Flörke) Moberg - Rosentreter (2008 Internet)
- Phaeophyscia orbicularis (Neck.) Moberg - Rosentreter (2008 Internet)
- Phaeophyscia sciastra (Ach.) Moberg - Thomson (1984: 349), Rosentreter (2008 Internet)
- Phaeorrhiza nimbosa (Fr.) H. Mayrhofer & Poelt - Rosentreter (2008 Internet)
- Phaeorrhiza sareptana (Tomin) H. Mayrhofer & Poelt - Rosentreter (2008 Internet)
- Physcia adscendens H. Olivier - Thomson (1984: 352), Rosentreter (2008 Internet)
- Physcia aipolia (Ehrh. ex Humb.) Fürnr. - Thomson (1984: 353), Rosentreter (2008 Internet)
- Physcia caesia (Hoffm.) Hampe ex Fürnr. - Thomson (1984: 354), Rosentreter (2008 Internet)
- Physcia dimidiata (Arnold) Nyl. - Rosentreter (2008 Internet)
- Physcia dubia (Hoffm.) Lettau - Thomson (1984: 355), Rosentreter (2008 Internet)
- Physcia magnussonii Frey - Esslinger (1979: 212 First record for North America), Rosentreter (2008 Internet)
- Physcia phaea (Tuck.) J.W. Thomson - Thomson (1984: 355), Rosentreter (2008 Internet)
- Physcia stellaris (L.) Nyl. - Anderegg et al. (1973: 207), Rosentreter (2008 Internet)
- Physcia tenella (Scop.) DC. - Rosentreter (2008 Internet)
- Physconia americana Essl. - Esslinger (1994: 91 Type in Durham, North Carolina, USA DUKE)
- Physconia detersa (Nyl.) Poelt - Thomson (1984: 359), Rosentreter (2008 Internet)
- Physconia enteroxantha (Nyl.) Poelt - Rosentreter (2008 Internet)
- Physconia isidiigera (Zahlbr.) Essl. - Rosentreter (2008 Internet)
- Physconia muscigena (Ach.) Poelt - Thomson (1984: 360), Rosentreter (2008 Internet)
- Pilophorus acicularis (Ach.) Th. Fr. - Rosentreter (2008 Internet)
- Placidium squamulosum (Ach.) Breuss - Rosentreter (2008 Internet)
- Placopsis gelida (L.) Lindsay - Thomson (1997: 472), Rosentreter (2008 Internet)
- Placynthiella icmalea (Ach.) Coppins & P. James - Rosentreter (2008 Internet)
- Placynthiella oligotropha (J. R. Laudon) Coppins & James - Thomson (1997: 474), Rosentreter (2008 Internet)
- Placynthiella uliginosa (Schrad.) Coppins & James - Thomson (1997: 475), Rosentreter (2008 Internet)
- Placynthium nigrum (Hudson) Gray - Rosentreter (2008 Internet)
- Platismatia glauca (L.) C. F. Culb. & W. L. Culb. - Müller (1889: 364 as Cetraria glauca), Cooke (1955: 142 as Cetraria glauca), Cooke (1955: 144 as Cetraria glauca f. corralloidea), Culberson & Culberson (1968: 536), Thomson (1984: 368), Schroeder et al. (1975: 34), Rosentreter (2008 Internet)
- Platismatia stenophylla (Tuck.) W. L. Culb. & C. F. Culb. - Rosentreter (2008 Internet)
- Pleopsidium chlorophanum (Wahlenb.) Zopf - Rosentreter (2008 Internet)
- Polycauliona candelaria (L.) Frödén, Arup & Søchting - Thomson (1984: 483 as Xanthoria candelaria), Rosentreter (2008 Internet as Xanthoria candelaria)
- Polycauliona luteominia (Tuck.) Arup, Frödén & Søchting var. luteominia - Rosentreter (2008 Internet as Caloplaca luteominia)
- Polycauliona polycarpa (Hoffm.) Frödén, Arup & Søchting - Thomson (1984: 487 as Xanthoria polycarpa), Rosentreter (2008 Internet as Xanthoria polycarpa)
- Polychidium muscicola (Sw.) Gray - Thomson (1984: 370), Rosentreter (2008 Internet)
- Porpidia crustulata (Ach.) Hertel & Knoph - Rosentreter (2008 Internet)
- Porpidia rugosa (Taylor) Coppins & Fryday - Rosentreter (2008 Internet as Porpidia glaucophaea)
- Protopannaria pezizoides (Weber) P. M. Jørg. & S. Ekman - Rosentreter (2008 Internet)
- Pseudephebe minuscula (Nyl. ex Arnold) Brodo & D. Hawksw. - Thomson (1984: 373), Rosentreter (2008 Internet)
- Pseudephebe pubescens (L.) M. Choisy - Rosentreter (2008 Internet)
- Psora cerebriformis W. A. Weber - Rosentreter (2008 Internet)
- Psora crenata (Taylor) Reinke - Rosentreter (2008 Internet)
- Psora decipiens (Hedwig) Hoffm. - Thomson (1997: 507), Rosentreter (2008 Internet)
- Psora globifera (Ach.) A. Massal. - Thomson (1997: 508), Rosentreter (2008 Internet)
- Psora himalayana (Church. Bab.) Timdal - Thomson (1997: 507), Rosentreter (2008 Internet)
- Psora luridella (Tuck.) Fink - Rosentreter (2008 Internet)
- Psora montana Timdal - Rosentreter (2008 Internet)
- Psora nipponica (Zahlbr.) Gotth. Schneider - Thomson (1997: 510), Rosentreter (2008 Internet)
- Psora rubiformis (Ach.) Hook. - Rosentreter (2008 Internet)
- Psora tuckermanii R. A. Anderson ex Timdal - Rosentreter (2008 Internet)
- Psoroma hypnorum (Vahl) Gray - Thomson (1984: 375), Rosentreter (2008 Internet)
- Psorotichia nigra H. Magn. - Rosentreter (2008 Internet)
- Ramalina dilacerata (Hoffm.) Hoffm. - Rosentreter (2008 Internet)
- Ramalina obtusata (Arnold) Bitter - Rosentreter (2008 Internet)
- Ramalina subleptocarpha Rundel & Bowler - Rosentreter (2008 Internet)
- Ramalina thrausta (Ach.) Nyl. - Rosentreter (2008 Internet)
- Ramboldia cinnabarina (Sommerf.) Kalb, Lumbsch & Elix - Thomson (1997: 336 as Lecidea cinnabarina), Rosentreter (2008 Internet as Lecidea cinnabarina), Rosentreter (2008 as Pyrrhospora cinnabarina Internet)
- Ramboldia gowardiana (T. Sprib. & M. Hauck) Kalb, Lumbsch & Elix - Spribille & Hauck (2003: 560 as Pyrrhospora gowardiana), Rosentreter (2008 as Pyrrhospora gowardiana Internet)
- Rhizocarpon bolanderi (Tuck.) Herre - Rosentreter (2008 Internet)
- Rhizocarpon cookeanum H. Magn. - Runemark (1956: 87 Protologue) Type in Magnusson)
- Rhizocarpon effiguratum - Rosentreter (2008 Internet)
- Rhizocarpon eupetraeum (Nyl.) Arnold - Thomson (1997: 533), Rosentreter (2008 Internet)
- Rhizocarpon geminatum - Rosentreter (2008 Internet)
- Rhizocarpon geographicum (L.) DC. - Thomson (1997: 538), Rosentreter (2008 Internet)
- Rhizocarpon grande (Flörke ex Flot.) Arnold - Thomson (1997: 539), Rosentreter (2008 Internet)
- Rhizocarpon macrosporum Räsänen - Anderegg et al. (1973: 207), Rosentreter (2008 Internet)
- Rhizocarpon malenconianum - Rosentreter (2008 Internet)
- Rhizocarpon riparium Räsänen - Thomson (1997: 548), Rosentreter (2008 Internet)
- Rhizocarpon superficiale (Schaer.) Vain. - Thomson (1997: 551), Rosentreter (2008 Internet)
- Rhizoplaca chrysoleuca (Sm.) Zopf - Thomson (1997: 554), Rosentreter (2008 Internet)
- Rhizoplaca haydenii (Tuck.) W. A. Weber subsp. haydenii - Rosentreter (2008 Internet)
- Rhizoplaca haydenii (Tuck.) W. A. Weber subsp. arbuscula Rosentreter - Rosentreter (2008 Internet)
- Rhizoplaca idahoensis Rosentreter & McCune - McCune & Rosentreter (2007: 91 Type in OSC), Rosentreter (2008 Internet)
- Rhizoplaca melanophthalma (Ramond) Leuck. & Poelt subsp. melanophthalma - Thomson (1997: 555), Rosentreter (2008 Internet)
- Rhizoplaca melanophthalma (Ramond) Leuck. & Poelt subsp. cerebriformis Rosentreter & B. D. Ryan - Rosentreter (2008 Internet)
- Rhizoplaca melanophthalma (Ramond) Leuck. & Poelt subsp. crispa Rosentreter & B. D. Ryan - Rosentreter (2008 Internet)
- Rhizoplaca peltata (Ramond) Leuckert & Poelt - Thomson (1997: 555), Rosentreter (2008 Internet)
- Rhizoplaca polymorpha S. D. Leav., Fern.-Mend., Lumbsch, Sohrabi & St. Clair - Leavitt et al. (2013: 11 Type in Provo, Utah BRY)
- Rinodina archaea (Ach.) Arnold - Thomson (1997: 560), Rosentreter (2008 Internet)
- Rinodina bischoffii (Hepp) A. Massal. - Rosentreter (2008 Internet)
- Rinodina freyi H. Magn. - Rosentreter (2008 as Rinodina glauca Internet)
- Rinodina hallii Tuck. - Rosentreter (2008 Internet)
- Rinodina juniperina Sheard - Rosentreter (2008 Internet)
- Rinodina lobulata H. Mayrhofer & Sheard - Rosentreter (2008 Internet)
- Rinodina terrestris Tomin - Thomson (1997: 568 as Rinodina mucronatula), Rosentreter (2008 as Rinodina mucronatula Internet)
- Romjularia lurida (Ach.) Timdal - Thomson (1997: 509 as Psora lurida), Rosentreter (2008 Internet), Rosentreter (2008 as Mycobilimbia lurida Internet)
- Rufoplaca arenaria (Pers.) Arup, Søchting & Frödén - Rosentreter (2008 Internet as Caloplaca arenaria)
- Rusavskia elegans (Link) S. Y. Kondr. & Kärnefelt - Rosentreter (2008 Internet as Xanthoria elegans)
- Sagedia mastrucata (Wahlenb.) A. Nordin, Savic & Tibell - Rosentreter (2008 Internet as Aspicilia mastrucata)
- Sarcogyne mitziae K. Knudsen, Kocourk. & McCune - Knudsen et al. (2013: 122), Rosentreter (2008 Internet)
- Scytinium cellulosum (P. M. Jørg. & Tønsberg) Otálora, P. M. Jørg. & Wedin - Rosentreter (2008 Internet as Leptogium cellulosum)
- Scytinium intermedium (Arnold) Otálora, P. M. Jørg. & Wedin - Rosentreter (2008 Internet as Leptogium intermedium)
- Scytinium lichenoides (L.) Otálora, P. M. Jørg. & Wedin - Rosentreter (2008 as Leptogium lichenoides Internet)
- Scytinium palmatum (Huds.) Gray - Thomson (1984: 260 as Leptogium palmatum), Rosentreter (2008 as Leptogium palmatum Internet)
- Scytinium subtile (Schrad.) Otálora, P. M. Jørg. & Wedin- Rosentreter (2008 as Leptogium subtile Internet)
- Scytinium tenuissimum (Hoffm.) Otálora, P. M. Jørg. & Wedin - Rosentreter (2008 as Leptogium tenuissimum Internet)
- Seirophora contortuplicata (Ach.) Frödén - Rosentreter (2008 Internet)
- Solorina crocea (L.) Ach. - Thomson (1984: 387), Rosentreter (2008 Internet)
- Solorian spongiosa (Ach.) Anzi - Rosentreter (2008 Internet)
- Sphaerophorus globosus (Huds.) Vain. - Anderegg et al. (1973: 207), Rosentreter (2008 Internet)
- Spilonema revertens Nyl. - Rosentreter (2008 Internet)
- Staurothele areolata (Ach.) Lettau - Thomson (1997: 592), Rosentreter (2008 Internet)
- Staurothele clopimoides (Bagl. & Carestia) J. Steiner - Rosentreter (2008 Internet)
- Staurothele drummondii (Tuck.) Tuck. - Thomson (1997: 595), Rosentreter (2008 Internet)
- Staurothele fissa (Tayler) Zwackh. - Thomson (1997: 596), Rosentreter (2008 Internet)
- Staurothele monicae (Zahlbr.) Wetmore - Rosentreter (2008 Internet)
- Staurothele rugosa J. W. Thomson - Rosentreter (2008 Internet)
- Stereocaulon glareosum (Savicz) H. Magn. - Rosentreter (2008 Internet)
- Stereocaulon paschale (L.) Hoffm. - Rosentreter (2008 Internet)
- Stereocaulon tomentosum Fr. - Rosentreter (2008 Internet)
- Tephromela atra (Huds.) Hafellner - Thomson (1997: 633), Rosentreter (2008 Internet)
- Tetramelas papillatus (Sommerf.) Kalb - Thomson (1997: 136 as Buellia papillata), Rosentreter (2008 Internet as Buellia papillata)
- Tetramelas terricolus (A. Nordin) Kalb - Thomson (1997: 133 erroneously as Buellia geophila), Rosentreter (2008 erroneously as Tetramelas geophila Internet), Rosentreter (2008 Internet as Buellia terricola)
- Thamnolia vermicularis (Sw.) Ach. ex Schaer. - Rosentreter (2008 Internet)
- Thelenella muscorum (Fr.) Vain. var. muscorum - Rosentreter (2008 Internet)
- Thelenella muscorum (Fr.) Vain. var. octospora (Nyl.) Coppins & Fryday - Rosentreter (2008 Internet)
- Thelomma ocellatum (Körb.) Tibell - Rosentreter (2008 Internet)
- Thrombium epigaeum (Pers.) Wallr. - Rosentreter (2008 Internet)
- Toninia candida (Weber) Th. Fr. - Rosentreter (2008 Internet)
- Toninia ruginosa (Tuck.) Herre - Rosentreter (2008 Internet)
- Toninia sedifolia (Scop.) Timdal - Thomson (1997: 614 as Toninia caeruleonigricans), Rosentreter (2008 as Toninia caeruleonigricans Internet), Rosentreter (2008 Internet)
- Toninia squalida (Schleicher ex Ach.) A. Massal. - Thomson (1997: 619), Rosentreter (2008 Internet)
- Toninia tristis (Th. Fr.) Th. Fr. subsp. asiae-centralis (H. Magn.) Timdal - Rosentreter (2008 Internet)
- Trapeliopsis bisorediata McCune & Camacho - Rosentreter (2008 Internet)
- Trapeliopsis glaucopholis (Nyl. ex Hasse) Printzen & McCune - Rosentreter (2008 Internet)
- Trapeliopsis granulosa (Hoffm.) Lumbsch - Thomson (1997: 624), Rosentreter (2008 Internet)
- Trapeliopsis steppica McCune & Camacho - Rosentreter (2008 Internet)
- Trapeliopsis viridescens (Schrad.) Coppins & P. James - Thomson (1997: 625), Rosentreter (2008 Internet)
- Tremolecia atrata (Ach.) Hertel - Rosentreter (2008 Internet)
- Tuckermanopsis chlorophylla (Willd.) Hale - Thomson (1984: 73 as Cetraria chlorophylla), Rosentreter (2008 Internet)
- Tuckermanopsis orbata (Nyl.) M. J. Lai - Rosentreter (2008 Internet)
- Tuckermanopsis platyphylla (Tuck.) Hale - Rosentreter (2008 Internet)
- Umbilicaria americana Poelt & T. H. Nash - Rosentreter (2008 Internet)
- Umbilicaria angulata Tuck. - Thomson (1984: 442), Rosentreter (2008 Internet)
- Umbilicaria hyperborea (Ach.) Hoffm. var. hyperborea - Thomson (1984: 453), Rosentreter (2008 Internet)
- Umbilicaria phaea Tuck. - Thomson (1984: 455), Rosentreter (2008 Internet)
- Umbilicaria polaris (Schol.) Zahlbr. - Thomson (1984: 289 erroneously as Omphalodiscus virginis), Rosentreter (2008 Internet erroneously as Umbilicaria krascheninnikovii)
- Umbilicaria polyphylla (L.) Baumg. - Thomson (1984: 457), Rosentreter (2008 Internet)
- Umbilicaria polyrrhiza (L.) Fr. - Thomson (1984: 27 as Actinogyra polyrrhiza), Rosentreter (2008 Internet)
- Umbilicaria torrefacta (Lightf.) Schrad. - Thomson (1984: 459), Rosentreter (2008 Internet)
- Umbilicaria vellea (L.) Ach. - Thomson (1984: 460), Rosentreter (2008 Internet)
- Umbilicaria virginis Schaer. - Thomson (1984: 290 as Omphalodiscus virginis), Rosentreter (2008 Internet)
- Usnea dasopoga (Ach.) Röhl. - Thomson (1984: 465), Rosentreter (2008 Internet), Rosentreter (2008 as Usnea filipendula Internet)
- Usnea subfloridana Stirt. - Thomson (1984: 469), Rosentreter (2008 Internet)
- Usnea substerilis Mot. - Thomson (1984: 470), Rosentreter (2008 Internet)
- Vahliella leucophaea (Vahl) P. M. Jørg. - Rosentreter (2008 Internet)
- Variolaria amara Ach. - Rosentreter (2008 as Pertusaria amara Internet)
- Variolaria ophthalmiza (Nyl.) Darb. - Rosentreter (2008 as Pertusaria ophthalmiza Internet)
- Verrucaria viridula (Schrad.) Ach. - Rosentreter (2008 Internet)
- Vulpicida canadensis (Räsänen) J.-E. Mattsson & M. J. Lai - Rosentreter (2008 Internet)
- Xanthocarpia lactea (A. Massal.) A. Massal. - Rosentreter (2008 Internet as Caloplaca lactea)
- Xanthocarpia tominii Savicz ex Frödén, Arup & Søchting - Thomson (1997: 174 as Caloplaca tominii), Rosentreter (2008 Internet as Caloplaca tominii)
- Xanthomendoza galericulata L. Lindblom - Lindblom (2006: 2 Protologue) Type
- Xanthomendoza hasseana (Räsänen) Søchting, Kärnefelt & S. Y. Kondr. - Rosentreter (2008 Internet)
- Xanthomendoza mendozae (Räsänen) S. Y. Kondr. & Kärnefelt - Rosentreter (2008 Internet)
- Xanthomendoza montana (L. Lindblom) Søchting, Kärnefelt & S. Y. Kondr. - Rosentreter (2008 Internet)
- Xanthomendoza oregana (Gyelnik) Søchting, Kärnefelt & S. Y. Kondr.- Rosentreter (2008 Internet)
- Xanthomendoza trachyphylla (Tuck.) Frödén, Arup & Søchting - Rosentreter (2008 Internet as Caloplaca trachyphylla)
- Xanthoparmelia angustiphylla (Gyeln.) Hale - Anderegg et al. (1973: 207 as Parmelia hypopsila), Rosentreter (2008 Internet)
- Xanthoparmelia camtschadalis (Ach.) Hale - Rosentreter (2008 Internet)
- Xanthoparmelia chlorochroa (Tuck.) Hale - Thomson (1984: 475), Rosentreter (2008 Internet)
- Xanthoparmelia coloradoensis (Ach.) Hale - Rosentreter (2008 Internet)
- Xanthoparmelia conspersa (Ehrh. ex Ach.) Hale - Rosentreter (2008 Internet)
- Xanthoparmelia cumberlandia (Gyeln.) Hale - Anderegg et al. (1973: 207 as Parmelia cumberlandia), Rosentreter (2008 Internet)
- Xanthoparmelia idahoensis Hale - Hale (1989: 547 Type in ), Rosentreter (2008 Internet)
- Xanthoparmelia loxodes (Nyl.) O. Blanco, A. Crespo, Elix, D. Hawksw. & Lumbsch - Rosentreter (2008 Internet as Neofuscelia loxodes)
- Xanthoparmelia mexicana (Gyeln.) Hale - Anderegg et al. (1973: 207 as Parmelia mexicana), Rosentreter (2008 Internet)
- Xanthoparmelia neochlorochroa Hale - Rosentreter (2008 Internet)
- Xanthoparmelia neowyomingica - Rosentreter (2008 Internet)
- Xanthoparmelia norchlorochroa Hale - Rosentreter (2008 Internet)
- Xanthoparmelia novomexicana (Gyeln.) Hale - Anderegg et al. (1973: 207 as Parmelia arseneana), Rosentreter (2008 Internet)
- Xanthoparmelia plittii (Gyeln.) Hale - Anderegg et al. (1973: 207 as Parmelia plittii), Rosentreter (2008 Internet)
- Xanthoparmelia subhosseana (Essl.) O. Blanco, A. Crespo, Elix, D. Hawksw. & Lumbsch - Rosentreter (2008 Internet as Neofuscelia subhosseana)
- Xanthoparmelia vagans (Nyl.) Hale - Rosentreter (2008 Internet)
- Xanthoparmelia verruculifera (Nyl.) O. Blanco, A. Crespo, Elix, D. Hawksw. & Lumbsch - Rosentreter (2008 Internet as Neofuscelia verruculifera)
- Xanthoparmelia wyomingica (Gyeln.) Hale - Rosentreter (2008 Internet)
- Xylographa parallela (Ach.: Fr.) Fr. - Rosentreter (2008 Internet)
- Xylopsora friesii - Rosentreter (2008 Internet as Hypocenomyce friesii)