Recorded only from Puuwaawaa in the district of North Kona, Hawaii Island. Fewer than 30 trees are known to remain. The taxon's habitat has been grazed for many decades, and now consists of scattered remant native trees in cattle pasture. Threats include cattle, pigs, alien plants, and fire.
As stated by the U.S. Fish and Wildlife Service at the time of listing (USFWS 1996), threats include:
Browsing by cattle, feral pigs and sheep
Trampling by cattle, feral pigs and sheep
Habitat disturbance by cattle, feral pigs and sheep
Only one population has ever been known, discovered by J.F. Rock in 1919, it is located at Puu Waawaa on Hualalai, on the island of Hawaii. Approximately 24 individuals are now known, scattered through the area. (USFWS 1996)
Arslanian et al. (1990) determined the biochemical constituents of this species' leaves.
Monitoring is necessary for basic information about this rare variety that can help direct any management efforts.
The integrity of the natural system where the only known population is found should be maintained.
Propagation and maintenance of ex situ plants is necessary.
More research is needed on long term seed storage techniques.
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