The following Participating Institutions are custodians for this species in the CPC National Collection:
Honolulu Botanical Gardens
The conservation of Gardenia mannii is fully sponsored.
Winnie Singeo contributed to this Plant Profile.
This member of the coffee family is a tree that grows to a height of up to 50 ft (15 m). Lance- to elliptic-shaped leaves have a sticky, glossy upper surface, and are clustered toward the tips of branches. Solitary flowers form at branch ends and are cream/white colored. These fragrant blossoms open in the late afternoon and last for about two days. (Wagner et al. 1999; USFWS 1996)
Distribution & Occurrence
Found on moderate to moderately steep gulch slopes between 980 and 2,460 feet in elevation. Medium to wet forests.
|27 populations total between 70 and 100 individuals, with 23 of the 27 populations each containing 5 or fewer individuals (USFWS 1996)|
Conservation, Ecology & Research
Habitat degradation and/or destruction by feral pigs
Potential damaging impacts from military activities
Competition with alien plants such as Koster
Water relations research
Susceptibility to diseases and pests
Huppman, L. 1995. Hawa'i's Gardenias. The Kukui Leaf. 22: 6-7.
USFWS. 1995. Proposed Endangered Status for Twenty-five Plant Species from the Island of Oahu, HI. Federal Register. 60, 190: 51398-51417.
USFWS. 1996. Determination of Endangered Status for Twenty-five Plant Species from the Island of Oahu, Hawaii. Federal Register. 61, 198: 53089-53108.
USFWS. 2002. Designations of Critical Habitat for Plant Species From the Island of Oahu, Hawaii. Federal Register. 67, 102: 37108-37156.