Haplostachys

{{Short description|Genus of flowering plants}}

{{Automatic taxobox

|name = Honohono

|image =

|image_caption =

|taxon = Haplostachys

|authority = (A.Gray) Hillebr.

}}

Haplostachys (honohono)[http://ecos.fws.gov/speciesProfile/profile/speciesProfile.action?spcode=Q1WW US Fish & Wildlife Service species profile, Honohono (Haplostachys haplostachya)] is a genus of flowering plants in the mint family, Lamiaceae, first described as a genus in 1888. The entire genus is endemic to the Hawaiian Islands, although 4 of the 5 known species that have been placed in the genus are now believed to be extinct, the fifth listed as "Critically Imperiled."[http://apps.kew.org/wcsp/namedetail.do?name_id=96253 Kew World Checklist of Selected Plant Families]{{Cite web |url=http://www.kew.org/msbp/extinct/database/Labiatae_Haplostachys_munroi.htm |title=Kew Royal Botanic Gardens extinct plants index |access-date=2014-08-25 |archive-url=https://web.archive.org/web/20140826114943/http://www.kew.org/msbp/extinct/database/Labiatae_Haplostachys_munroi.htm |archive-date=2014-08-26 |url-status=dead }}Loeffler, W.; Morden, C.W. 1997. Effects of population fragmentation on genetic variation of Haplostachys haplostachya, an endangered Hawaiian mint. Newsletter of the Hawaiian Botanical Society. 36: 42-46.Sherff, E.E. 1935. Revision of Haplostachys, Phyllostegia, and Stenogyne. Bernice P. Bishop Museum Bulletin. 136: 1-101.US Fish & Wildlife Service. 1979. Determination that three Hawaiian plants are endangered species. Federal Register. 44, 211: 62468 - 62469.

;Species

• †Haplostachys bryanii Sherff - Molokai but apparently extinct
• Haplostachys haplostachya (A.Gray) H.St.John - Kauai, Maui, Hawaii; Critically Imperiled
• †Haplostachys linearifolia (Drake) Sherff - Maui, Molokai but apparently extinct on both islands
• †Haplostachys munroi C.N.Forbes - Lanai but apparently extinct
• †Haplostachys truncata (A.Gray) Hillebr. - Maui but apparently extinct