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.
World Conservation Monitoring Centre 1998. Hibiscus waimeae ssp. hannerae. In: IUCN 2010. IUCN Red List of Threatened Species. Version 2010.4. <www.iucnredlist.org>. Downloaded on 06 April 2011