Overview

Distribution

National Distribution

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

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Global Range: Endemic to Northern Kauai.

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Range Description

Confined to Kauai, where two remaining subpopulations occur in adjacent valleys, Limahuli and Hanakapiai, on the north coast. An additional subpopulation in Kalihiwai appears to be extinct.
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Historic Range:
U.S.A. (HI)

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Ecology

Habitat

Comments: Moist and wet forests in gulch bottoms.

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Habitat and Ecology

Habitat and Ecology
A rainforest tree.

Systems
  • Terrestrial
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Population Biology

Number of Occurrences

Note: For many non-migratory species, occurrences are roughly equivalent to populations.

Estimated Number of Occurrences: 1 - 5

Comments: 2 current (between 1982 and 1997) and 1 historical occurrence.

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Conservation

Conservation Status

National NatureServe Conservation Status

United States

Rounded National Status Rank: N1 - Critically Imperiled

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NatureServe Conservation Status

Rounded Global Status Rank: T1 - Critically Imperiled

Reasons: Recorded from only a few locations in northern Kauai. It is currently known from 2 occurrences, totaling fewer than 200 individuals. It is threatened by feral pigs and alien plants.

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IUCN Red List Assessment


Red List Category
EN
Endangered

Red List Criteria
B1+2c, C2a, D

Version
2.3

Year Assessed
1998
  • Needs updating

Assessor/s
World Conservation Monitoring Centre

Reviewer/s

Contributor/s

History
  • 1997
    Endangered
    (Walter and Gillett 1998)
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Current Listing Status Summary

Status: Endangered
Date Listed: 10/10/1996
Lead Region:   Pacific Region (Region 1) 
Where Listed:


Population detail:

Listing status: E

For most current information and documents related to the conservation status and management of Hibiscus waimeae hannerae, see its USFWS Species Profile

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Population

Population
After Hurricane Iniki, the subpopulation in Hanakapiai Valley was halved to about 25 plants. The second population consists of between 50 and 100 plants.
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Threats

Comments: Major threats include habitat degradation by feral pigs and competition with alien plant species (Clidemia, Lantana).

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Major Threats
The lowland rainforest habitat is frequently damaged by feral pigs and invaded by introduced plants.
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Management

Biological Research Needs: Population biology and ecology.

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Conservation Actions

Conservation Actions
The species is listed under the US Endangered Species Act.
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Names and Taxonomy

Taxonomy

Comments: GENUS FOUND IN TROPICAL AND SUBTROPICAL REGIONS OF THE WORLD, SPECIES ENDEMIC TO NORTHERN AND WESTERN KAUAI. TWO VARIETIES RECOGNIZED BY WAGNER ET AL.

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