Species having 'occidentalis' as epithet name:
- Abies occidentalis Syn. for: Abies grandis
- Acajuba occidentalis Syn. for: Anacardium occidentale
- Amorpha occidentalis Syn. for: Amorpha fruticosa
- Cassia occidentalis Syn. for: Senna occidentalis
- Ditramexa occidentalis Syn. for: Senna occidentalis
- Ditremexa occidentalis Syn. for: Senna occidentalis
- Echinochloa occidentalis Syn. for: Echinochloa crus-galli
- Helleborus occidentalis
- Melissa occidentalis Syn. for: Melissa officinalis
- Senna occidentalis
- Tamarindus occidentalis Syn. for: Tamarindus indica
- Telfairia occidentalis