Haematostereum sanguinolentum – synonym of Physisporinus sanguinolentus
Hapalopilus nidulans – synonym of Hapalopilus rutilans
Helvella leucopus – synonym of Helvella spadicea
Hericium clathroides – synonym of Hericium coralloides
Heteroporus biennis – synonym of Abortiporus biennis
Hygrocybe sciophana – synonym of Hygrocybe perplexa
Hygrophorus dichrous – synonym of Hygrophorus persoonii
Hymenoscyphus conscriptus – synonym of Hymenoscyphus salicinus
Hymenoscyphus herbarum – synonym of Calycina herbarum
Hyphoderma radula – synonym of Basidioradulum radula
Hyphoderma sambuci – synonym of Rogersella sambuci
Hyphodontia sambuci – synonym of Rogersella sambuci
Hypholoma capnoides – synonym of Psilocybe capnoides
Hypholoma elongatipes – synonym of Psilocybe elongata
Hypholoma elongatum – synonym of Psilocybe elongata
Hypholoma fascicularis – synonym of Psilocybe fascicularis
Hypholoma sublateritium – synonym of Psilocybe sublateritia
Hypoderma virgultorum – synonym of Hypoderma rubi
Hypomyces chrysospermus – synonym of Sepedonium chrysospermum
Hysterium rubi – synonym of Hypoderma rubi