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- Croton oblongifolius
- Croton oblongus
- Croton odontadenius
- Croton oerstedianus
- Croton oleoides
- Croton oligandrum
- Croton orbignyanus
- Croton oreades
- Croton organensis
- Croton origanifolius
- Croton ortholobus
- Croton ovalifolius
Read more about this topic: List Of Croton Species