The following Participating Institutions are custodians for this species in the CPC National Collection:
Harold L. Lyon Arboretum
The conservation of Schiedea adamantis is fully sponsored.
Nellie Sugii contributed to this Plant Profile.
This species was first collected on the slopes of Diamond Head Crater on O`ahu, Hawai`i in 1955 and described as a valid new species in 1970. It is a small shrub known only from one population, and has survived in the Diamond Head Crater area despite the growing urbanization of the area. Schiedea adamantis exists under harsh conditions, buffeted by strong winds, high light intensity, low precipitation, and high temperatures. Since 1988, unusually prolonged drought conditions at Diamond Head have caused the decimation of the Schiedea population. Originally consisting of about 200 individuals, only 2 plants are currently known to be alive though, a few more may recover with increased precipitation.
Distribution & Occurrence
Dry steep slopes in the Diamond Head Crater area of O'ahu, Hawaii (Wagner et. al 1999; USFWS 1994)
|Possibly only 2 remaining wild individuals in 1 population at Diamond Head, O`ahu, Hawai`i. A few more individuals may recover with additional precipitation, but it is doubtful (Trae Menard Pers. Comm. 2001) and (Wagner et. al 1999).|
Conservation, Ecology & Research
Small population size
Habitat degradation, including soil compaction from hikers and sightseers on nearby trails
(USFWS 1994, 2001)
Reproductive Biology-Dr. Stephen Weller, Univ. of California-Irvine
Propagation-Harold L. Lyon Arboretum
The propagation of plants in the genus Schiedea has been studied both at the Harold L. Lyon Arboretum and Waimea Arboretum & Botanical Garden. (Llop & Woolliams 1991)
Seed Banking-Dr. Steven Weller, Univ. of California-Irvine
Population Genetics-Dr. Stephen Weller, Univ. of California-Irvine
Breeding system evolution in the Schiedea genus--Dr. Theresa Culley, assistant professor at University of Cincinnati, has done work in this area with Dr. Stephen Weller, Ann Sakai and Diane Campbell (Culley 2002)
Establish more outplanting sites.
Controlled breeding and propagation program.
Aquire and establish vegetative propagules from remaining wild individuals.
Continuation of strategic ex situ breeding.