Species having 'dubia' as epithet name:
- Brucea dubia Syn. for: Picrasma javanica
- Cerastites dubia Syn. for: Papaver dubium
- Crepis dubia Syn. for: Crepis biennis
- Echinochloa dubia Syn. for: Echinochloa crus-galli
- Lindernia dubia
- Monarda dubia Syn. for: Monarda fistulosa
- Petrorhagia dubia
- Salvia dubia Syn. for: Salvia pratensis