Science magazines
- 'Oha Wai (Clermontia oblongifolia ssp. mauiensis)
- 'Oha Wai (Clermontia peleana)
- 'Oha Wai (Clermontia pyrularia)
- 'Oha Wai (Clermontia samuelii)
- 'Ohai
- 'Ohe'ohe
- 'Olulu
- A'e (Zanthoxylum dipetalum var. tomentosum)
- A'e (Zanthoxylum hawaiiense)
- Abutilon Eremitopetalum
- Abutilon Sandwicense
- Achyranthes mutica
- Adiantum Vivesii
- Agrimony Sandbur
- Akepa
- Akiapolaau
- Alabama Beach Mouse
- Alabama Canebrake Pitcher-plant
- Alabama Cave Shrimp
- Alabama Cavefish