H.St.John & Kuykend.
Gardenia mannii (nānū, Oahu gardenia or Mann's gardenia) is a species of flowering tree in the coffee family, Rubiaceae, that is endemic to the island of Oʻahu in Hawaiʻi. It inhabits coastal mesic, mixed mesic, and wet forests at elevations of 100–730 m (330–2,400 ft) in the Koʻolau and Waiʻanae Ranges. It is threatened by habitat loss.
There are 18 populations remaining with a total of no more than 110 individuals.
- World Conservation Monitoring Centre 1998. Gardenia mannii. 2006 IUCN Red List of Threatened Species. Archived June 27, 2014, at the Wayback Machine. Downloaded on 21 August 2007.
- "nanu, nau". Hawaii Ethnobotany Online Database. Bernice P. Bishop Museum. Archived from the original on 2007-07-02. Retrieved 2009-11-09.
- "Gardenia mannii". CPC National Collection Plant Profiles. National Center for Plant Conservation. Archived from the original on 2010-10-28. Retrieved 2009-11-09.
- USFWS. Gardenia mannii Five-year Review. January 2008.
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