The following Participating Institutions are custodians for this species in the CPC National Collection:
The conservation of Hibiscus clayi is fully sponsored.
David Orr contributed to this Plant Profile.
Hibiscus clayi is a member of the mallow family (Malvaceae). It is a shrub or tree up to 4 to 8 meters tall with stems bearing sparse hairs at the branch tips. The flowers are borne singly near the ends of the branches are dark red in color. Hibiscus clayi was known from scattered locations on private and State land on the island of Kaua`i, but only the Nounou Mountains population, with four trees is still known to exist.
Before cattle were removed from the area, a great amount of damage was done to the Hisbiscus clayi habitat, which contributed significantly to the species decline. Currently, weeds are the major threat and a hiking trail in close proximity to most of the plants make them prone to human disturbance.
Distribution & Occurrence
Lowland dry forest generally growing on slopes at an elevation of 230 to 350 meters (USFWS 1995) and (Wagner et al. 1999).
|Kaua`i-Nounou Mountains, 1 population, 4 plants (USFWS 1995, 2001).|
Conservation, Ecology & Research
Human disturbance-a nearby hiking trail.
Stochastic extinction due to small number of existing individuals.
(USFWS 1995, 2001)
Control of feral pigs.
Control of alien plants.
Control human disturbance.
Propagation through- seeds, cuttings, tissue culture to increase genetic stock.
Williams, N. 1998. Ecology: Study Finds 10% of Tree Species Under Threat. Science. 281: 1426.