Gardenia mannii

{{Short description|Species of plant}}

{{Speciesbox

|status = CR

|status_system = IUCN2.3

|status_ref = {{cite iucn |author=World Conservation Monitoring Centre |date=1998 |title=Gardenia mannii |volume=1998 |page=e.T31365A9622131 |doi=10.2305/IUCN.UK.1998.RLTS.T31365A9622131.en |access-date=17 November 2021}}

|image = Gardenia mannii (5289403158).jpg

|genus = Gardenia

|species = mannii

|authority = H.St.John & Kuykend.

}}

Gardenia mannii, the nānū, Oahu gardenia or Mann's gardenia, is a species of flowering tree in the family Rubiaceae, that is endemic to the island of O{{okina}}ahu in Hawai{{okina}}i. It inhabits coastal mesic, mixed mesic, and wet forests at elevations of {{convert|100|–|730|m|ft|abbr=on}}{{cite web |url=http://www2.bishopmuseum.org/ethnobotanydb/resultsdetailed.asp?search=nanu |title=nanu, nau |publisher=Bernice P. Bishop Museum |work=Hawaii Ethnobotany Online Database |access-date=2009-11-09 |url-status=dead |archive-url=https://web.archive.org/web/20070702123908/http://www2.bishopmuseum.org/ethnobotanydb/resultsdetailed.asp?search=nanu |archive-date=2007-07-02 }} in the Ko{{okina}}olau and Wai{{okina}}anae Ranges.{{cite web|url=http://www.centerforplantconservation.org/Collection/CPC_ViewProfile.asp?CPCNum=7618 |title=Gardenia mannii |work=CPC National Collection Plant Profiles |publisher=National Center for Plant Conservation |access-date=2009-11-09 |url-status=dead |archive-url=https://web.archive.org/web/20101028203227/http://centerforplantconservation.org/Collection/CPC_ViewProfile.asp?CPCNum=7618 |archive-date=2010-10-28 }} It is threatened by habitat loss.

There are 18 populations remaining with a total of no more than 110 individuals.USFWS. [http://ecos.fws.gov/docs/five_year_review/doc1820.pdf Gardenia mannii Five-year Review.] January 2008.