The following Participating Institutions are custodians for this species in the CPC National Collection:
The conservation of Eugenia koolauensis is fully sponsored.
David Orr contributed to this Plant Profile.
Eugenia koolauensis is a member of the myrtle family (Myrtaceae). It is a small tree or shrub, and can reach 2 - 7 meters (7 - 23 feet) in height. Its branch tips are covered with dense brown hairs and their leathery oval leaves are densely hairy on the lower surface. From February to December, Eugenia koolauensis reveals its white flowers, which grow from the leaf axils on short stalks.
Eugenia koolauensis was historically known from Maunaloa on western Moloka`i and from scattered areas on the island of O`ahu. Now it is known only from 8 populations on O`ahu. This species is severely threatened by its limited numbers, which was caused mainly by weed competition and the effects of feral pigs.
Distribution & Occurrence
This species exist in dry gulches and ridges in mesic forests dominated by Metrosideros polymorpha or Diospyros
sp. From 57 to 437 m (187 to 1433 feet) in elevation (USFWS 2002) and (Wagner et al. 1999).
Other associated plant species include Alyxia oliviformis, Bobea elaitor, Carex meyenii, Dicranopteris linearis, Myrsine lessertiana, Nestegis sandwicensis, Pleomele halapepe, Pouteria sandwicensis, Psydrax odorata, Rauvolfia sandwicensis, or Styphelia tameiameiae. (USFWS 2002).
|O`ahu-Papali Gulch, the north fork of Kamananui Stream, in the regions of Aina Haina and Hawaii Loa, and two disjunct populations in the southeastern Koolau Mountains. There are 8 populations remaining with less than 200 individuals (USFWS 2001) and (USFWS 1996).|
Conservation, Ecology & Research
Alien plant species.
Stochastic extinction due to small population size.
In May 2002, the U.S. Fish and Wildlife Service determined that a designation of critical habitat was prudent for this species. (USFWS 2002)
Decrease human threat.
Seed banking and germplasm preservation.
Ex situ plantings at botanical gardens.
Jennings, W.F. 1990. Status Report on four plants considered rare in Colorado: Aletes humilis, Platanthera sparsiflora, Listera borealis, and Listera convallarioides. Unpublished report to the U.S. Forest Service.
USFWS. 1992. Proposed Endangered Status for 11 Plants From the Koolau Mountain Range, Island of Oahu, Hawaii. Federal Register. 57, 199: 47028-47040.
USFWS. 1994. Endangered Status for 11 Plant Species from the Koolau Mountain Range, Island of Oahu, HI. Federal Register. 59: 14482-14493.
USFWS. 2002. Designations of Critical Habitat for Plant Species From the Island of Oahu, Hawaii. Federal Register. 67, 102: 37108-37156.
USFWS. 2002. Revised Determinations of Prudency and Proposed Designations of Critical Habitat for Plant Species From the Island of Molokai, Hawaii. Federal Register. 67, 66: 16492-16579.