Hypnea adunca- Hypnea alopecuroides
- Hypnea arenaria
- Hypnea californica
- Hypnea cenomyce
- Hypnea cervicornis
- Hypnea charoides
- Hypnea chordacea
- Hypnea cornuta
- Hypnea corymbosa
- Hypnea divaricata
- Hypnea esperi
- Hypnea fastigiata
- Hypnea flagelliformis
- Hypnea hamulosa
- Hypnea intricata
- Hypnea japonica
- Hypnea johnstonii
- Hypnea krugiana
- Hypnea marchantae
- Hypnea musciformis
- Hypnea nidifica
- Hypnea nidulans
- Hypnea nigrescens
- Hypnea pannosa
- Hypnea planicaulis
- Hypnea saidana
- Hypnea setacea
- Hypnea spicifera
- Hypnea spinella
- Hypnea stellulifera
- Hypnea tenuis
- Hypnea vaga
- Hypnea valentiae
- Hypnea valida
- Hypnea variabilis
- Hypnea volubilis