Gardenia remyi, the nānū or Remy's gardenia, is a species of flowering tree in the madder family, Rubiaceae.
It is endemic to Hawaiʻi. It inhabits coastal mesic, mixed mesic, and wet forests at elevations of 60–760 m (200–2,490 ft) on Kauaʻi, Molokaʻi, Maui, and the Big Island.It is threatened by habitat loss.