Regularity: Regularly occurring
Global Range: It is currently known from Oahu, Lanai, Maui, and Hawaii and may possibly occur on Kauai (Federal Register, Vol. 58, no. 176).
Catalog Number: US 12845
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Pressed specimen
Collector(s): Wilkes Explor. Exped.
Year Collected: 1838
Locality: Maui, Hawaii, United States, Hawaiian Archipelago, Pacific Islands
- Holotype: Gray, A. 1854. U.S. Explor. Exped. 15: 175.
Comments: Dry shrublands and forests. On ridges, in gulches, and on old lava flows.
Number of Occurrences
Note: For many non-migratory species, occurrences are roughly equivalent to populations.
Estimated Number of Occurrences: 6 - 20
Comments: 12 populations are known to exist (Federal Register, Vol. 58, no. 176).
National NatureServe Conservation Status
Rounded National Status Rank: N1 - Critically Imperiled
NatureServe Conservation Status
Rounded Global Status Rank: G1 - Critically Imperiled
Reasons: Endemic to the islands of Oahu, Molokai, Maui, Lanai, and Hawaii. Fewer than 10 occurrences are currently known, totaling fewer than 400 plants. Threats include fire, agriculture, and alien plants and animals.
Date Listed: 11/10/1994
Lead Region: Pacific Region (Region 1)
Listing status: E
For most current information and documents related to the conservation status and management of Hibiscus brackenridgei, see its USFWS Species Profile
Comments: The primary threats appear to be habitat degradtion and possible predation by pigs, goats, axis deer, and cattle; competition with alien plant species; road construction; and stochastic extinction and/or reduced reproductive vigor due to the small number of individuals (Federal Register, Vol. 58, no. 176).
Biological Research Needs: Locate other populations and determine threats to the populations.
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