- Habitat
- Hadžiablahović, Sead
- Hadžić, Ibrahim
- Hajla
- Halácsy, Eugen von
- Halofite
- Hamefite
- Haplophyllum patavinum (L.) G. Don.
- Harmaja, Harri
- Hassert, Kurt
- Hayek, August Gustav Joseph Edler von
- Hazmofite
- Hedera helix L.
- Heliofite
- Helleborus L.
- Hemikriptofite
- Heracleum L.
- Herak, Milan
- Herbarijumi u Crnoj Gori
- Hermann, Friedrich
- Herniaria L.
- Heufler, Ludwig Ritter von
- Hibiscus trionum L.
- Hidrofite
- Hieracium L.
- Higrofite
- Himantoglossum Spreng.
- Hirc, Dragutin
- Höhnel, Franz Xaver Rudolf Ritter von
- Horák, Bohuslav
- Hortikultura
- Horvat, Ivo
- Horvatić, Stjepan
- Host, Nicolaus Thomas
- Hruby, Johann
- Humulus lupulus L.
- Hustedt, Friedrich
- Huter (Redžić), Aleksandra
- Huter, Rupert
- Hygrocybe coccineocrenata (P. D. Orton) M. M. Moser
- Hygrocybe intermedia (Pass.) Fayod
- Hyoscyamus niger L.
- Hypericum perforatum L.
- Hypholoma fasciculare (Huds.) P. Kumm.