| Haematomma caesium Coppins & P. James = Mycoblastus caesius |
| Haematomma coccineum = Haematomma ochroleucum |
| Haematomma elatinum (Ach.) A. Massal. = Loxospora elatina |
| Haematomma lapponicum = Ophioparma lapponica Hafellner & R.W. Rogers, |
| Haematomma leprarioides auct., non (Vain.) Vain. = Haematomma sorediatum |
| Haematomma neglectum Lumbsch & Feige = Haematomma sorediatum |
| Haematomma ventosum (L.) A. Massal. = Ophioparma ventosa |
| Haematomma ventosum subsp. lapponicum J.R. Laundon = Ophioparma lapponica Hafellner
& R.W. Rogers, |
| Hafellia arnoldii (Servнt) Hafellner & Tьrk = Buellia arnoldii |
| Hafellia disciformis (Fr.) Marbach & H. Mayrhofer = Buellia disciformis |
| Hafellia leptoclinoides (Nyl.) Schied. & H. Mayrhofer = Buellia leptoclinoides |
| Hafellia sanguinolenta (T. Schauer) Hafellner & Tьrk = Buellia sanguinolenta |
| Hastifera tenuispora D. Hawksw. & Poelt = Micarea cinerea f. tenuispora |
| Helocarpon crassipes Th. Fr. = Micarea crassipes |
| Helotium cambricum W. Phillips (nom. inval.) = Dimerella lutea |
| Hemigrapha astericus = Hemigrapha atlantica |
| Heterodermia leucomelaena (L.) Poelt = Heterodermia leucomela |
| Heterodermia leucomelos (L.) Poelt = Heterodermia leucomela |
| Heterodermia obscurata, non (Nyl.) Trevis. = Heterodermia japonica |
| Heterodermia propagulifera (Vain.) J.P. Dey = Heterodermia japonica |
| Hobsonia christiansenii B.L. Brady & D. Hawksw. = Illosporiopsis christiansenii |
| Huilia albocaerulescens = Porpidia cinereoatra |
| Huilia albocaerulescens = Porpidia contraponenda |
| Huilia albocaerulescens = Porpidia platycarpoides |
| Huilia cinereoatra (Ach.) Hertel = Porpidia cinereoatra |
| Huilia consentiens (Nyl.) Hertel = Amygdalaria consentiens |
| Huilia crustulata (Ach.) Hertel = Porpidia crustulata |
| Huilia flavocaerulescens (Hornem.) Hertel [nom. rejic. prop.], p.min.p. = Porpidia
flavicunda |
| Huilia flavocaerulescens [sorediate taxon] = Porpidia melinodes |
| Huilia flavocaerulescens p.max.p. = Porpidia flavocruenta |
| Huilia glaucophaea Hertel = Porpidia rugosa |
| Huilia hydrophila (Fr.) Hertel = Porpidia hydrophila |
| Huilia macrocarpa (DC.) Hertel = Porpidia macrocarpa |
| Huilia melinodes Hertel = Porpidia melinodes |
| Huilia nigrocruenta (Anzi) Hertel = Porpidia macrocarpa f. nigrocruenta |
| Huilia platycarpoides (Bagl.) Hertel = Porpidia platycarpoides |
| Huilia soredizodes (Lamy ex Nyl.) Hertel = Porpidia soredizodes |
| Huilia tuberculosa (Sm.) P. James = Porpidia tuberculosa |
| Hymenelia epulotica (Ach.) Lutzoni sensu Lutzoni = Hymenelia prevostii |
| Hymenelia lacustris (With.) M. Choisy = Ionaspis lacustris |
| Hymenelia obtecta (Vain.) Poelt & Vzda = Ionaspis obtecta |
| Hymenelia rhodopsis = Hymenelia rhodopis |
| Hymenodecton dendriticum ((Ach.) Leight. = Phaeographis dendritica |
| Hypocenomyce leucococca R. Sant. = Pycnora leucococca |
| Hypocenomyce sorophora (Vain.) P. James & Poelt = Pycnora sorophora |
| Hypocenomyce xanthococca (Sommerf.) P. James & Gotth. Schneid. = Pycnora
xanthococca |
| Hypogymnia alpicola (Th. Fr.) Hav. = Allantoparmelia alpicola |
| Hypogymnia bitteriana (Zahlbr.) = Hypogymnia farinacea |
| Hypogymnia encausta (Sm.) Walt. Watson = Brodoa intestiniformis |
| Hypogymnia intestiniformis (Vill.) = Brodoa intestiniformis |
| Hypogymnia vittata pre-1998 = Hypogymnia physodes |
