This species is endemic to the southern Waianae Mountains of Oahu, with only two wild plants now known. When the first population was discovered in 1987 it consisted of about 20 plants. That population has been reduced to a single plant. The species and its habitats are threatened by feral pigs and alien plant species.
Although no longer found in the wild, past threats to S. perlmanii included habitat degradation by alien plants (Schinus terebinthifolius [Christmas berry], Myrica faya [firetree], and Melinus minutiflora [molasses grass]) feral pigs. These threats are s
Number of Populations: 0 (USFWS 2001)
Number of Plants: 20 (USFWS 2001)
S. perlmanii is being propagated at the National Tropical Botanical Garden (NTBG) and the Lyon Arboretum.
The Nature Conservancy of Hawaii (TNCH) has plans to construct a 90-acre fence that will include the site where S. perlmanii was last seen, this will be an ideal area to outplant individuals in the future (USFWS 1998).
NTBG currently has ex situ holdings of an unknown amount of seeds in its seed bank, and 14 plants in the nursery which represent a single population.
1. Conduct surveys on S. perlmanii of their appropriate habitat in historical habitat in historical locations in the Waianae Mountain to determine if any extant populations of this species exist.
2. Maintain cultivated stock of S. perlmanii to prevent the extinction of this species.
3. Establish new populations within its historical range, in areas that are managed to minimize the impacts of feral ungulates and alien plants.
4. Conduct pollination biology studies.
5. Map genetic diversity in the surviving populations of S. perlmanii.
6. Test the influence of weeding and fencing on populations of S. perlmanii.
Recommendations derived from M.H. Chapin, M. Maunder, and USFWS (1998).
1. Establish secure ex situ stocks with full founder representation.
2. Develop proper horticultural and pest management protocols for S. perlmanii.
Recommendations derived from M. Maunder.
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