Melanelia albertana (see Melanelixia albertana)
Melanelia commixta (see Cetrariella commixta)
Melanelia culbersonii
Melanelia disjuncta (see Montanelia disjuncta)
Melanelia elegantula (see Melanohalea elegantula)
Melanelia exasperatula (see Melanohalea exasperatula)
Melanelia fuliginosa ("apparently absent from N. America" but photos have been put under Melanelxia grabatula)
Melanelia glabra (see Melanelixia californica)
Melanelia halei (see Melanohalea halei)
Melanelia hepatizon
Melanelia multispora (see Melanohalea multispora)
Melanelia olivacea (see Melanohalea olivacea)
Melanelia panniformis (see Montanelia panniformis)
Melanelia septentrionalis (see Melanohalea septentrionalis)
Melanelia sorediata (see Montanelia sorediata)
Melanelia stygia
Melanelia subargentifera (see Melanelixia subargentifera)
Melanelia subaurifera (see Melanelixia subaurifera)
Melanelia subelegantula (see Melanohalea subelegantula)
Melanelia subolivacea (see Melanohalea subolivacea)
Melanelia tominii (see Montanelia tominii)
Melanelia (in the former sense of the genus) -unidentified species

Melanelixia albertana
Melanelixia californica
Melanelxia fuliginosa (see Melanelxia grabatula)
Melanelxia grabatula
Melanelixia subargentifera
Melanelixia subaurifera

Melanohalea elegantula
Melanohalea exasperatula
Melanohalea halei
Melanohalea multispora
Melanohalea olivacea
Melanohalea septentrionalis
Melanohalea subelegantula
Melanohalea subolivacea

Menegazzia subsimilis

Micarea erratica? (see Leimonis erratica)
Micarea peliocarpa
Micarea prasina

Miriquidica scotopholis

Montanelia disjuncta
Montanelia panniformis
Montanelia sorediata
Montanelia tominii ("but North American reports are M. saximontana or M. secwepemc")

Multiclavula corynoides
Multiclavula (unidentified species)

Mycobilimbia berengeriana
Mycobilimbia tetramera

Mycoblastus sanguinarius

Mycocalicium subtile

Myelochroa aurulenta
Myelochroa galbina
Myelochroa obsessa

Myriolecis crenulata
Myriolecis dispersa
Myriolecis hagenii
Myriolecis schofieldii
Myriolecis zosterae

Myriotrema rufigerum

Myxobilimbia sabuletorum (see Bilimbia sabuletorum)

Neofuscelia species are now in Xanthoparmelia. Please go to Lichens Index 15: Usnea to Xylographa

Nephroma arcticum
Nephroma bellum
Nephroma expallidum
Nephroma helveticum
Nephroma isidiosum
Nephroma laevigatum
Nephroma occultum
Nephroma parile
Nephroma resupinatum
Nephroma (unidentified species)

Niebla cephalota
Niebla ceruchis
Niebla ceruchoides
Niebla combeoides
Niebla homalea
Niebla laevigata
Niebla polymorpha cfr.
Niebla procera
Niebla robusta
Niebla (unidentified species)

Nigrovothelium tropicum

Nodobryoria abbreviata
Nodobryoria oregana

Normandina pulchella

Ocellularia americana
Ocellularia sanfordiana

Ochrolechia africana
Ochrolechia alaskana
Ochrolechia androgyna
Ochrolechia arborea
Ochrolechia farinacea
Ochrolechia frigida
Ochrolechia juvenalis
Ochrolechia laevigata
Ochrolechia mexicana
Ochrolechia oregonensis
Ochrolechia pseudopallescens
Ochrolechia subpallescens
Ochrolechia subplicans
Ochrolechia tartarea
Ochrolechia trochophora
Ochrolechia upsaliensis
Ochrolechia yasudae
Ochrolechia (unidentified species)

Omphalora arizonica

Opegrapha herbarum
Opegrapha varia (see Alyxoria varia)
Opegrapha vulgata
Opegrapha zonata (see Enterographa zonata)
Opegrapha (unidentified species)

Ophioparma lapponica
Ophioparma rubricosa
Ophioparma ventosa

Orphniospora moriopsis