Haplostachys haplostachya

lassification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Asterids
Cladus: Lamiids
Ordo: Lamiales

Familia: Lamiaceae
Subfamilia: Lamioideae
Genus: Haplostachys
Species: Haplostachys haplostachya
Name

Haplostachys haplostachya (A.Gray) H.St.John
References

Mem. Pacific Trop. Bot. Gard. 1:292. 1973
USDA, ARS, Germplasm Resources Information Network. Haplostachys haplostachya in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 07-Oct-06.

Haplostachys haplostachya is a rare species of flowering plant in the mint family known by the common names honohono or Hawaiian mint. It is endemic to Hawaii, where it is now limited to the island of Hawaii and has been extirpated from Kauai and Maui.[1] It has been on the United States' endangered species list since 1979.[2]

Haplostachys haplostachya is probably the only one of the five Haplostachya species that is not now extinct, so it may be the only member of a monotypic genus.[3] There are now fewer than 20,000 individual plants in scattered fragmented populations remaining at Kipukakalawamauna[4][5] on the Pohakuloa Plateau, the site of the Pohakuloa Training Area.[1] At one time, the plant was not uncommon on the slopes of Mauna Loa and Mauna Kea.[3] Destruction of the habitat by feral ungulates, military construction, consequences of military activity such as dust and fires, introduced plant species, and deforestation have fragmented the plant's distribution and reduced it to its present low numbers.[3] This fragmentation has also led to physical and reproductive isolation in the smaller, more isolated populations, causing a genetic bottleneck.[3]

This is a perennial shrub which grows to 1.5 meters tall. The square stems are lined with fleshy, woolly, somewhat heart-shaped leaves. The inflorescence is a showy raceme of fragrant, woolly white flowers each up to 2 centimeters long.[3][4] The herbage lacks the minty taste and scent of other mints.[5]

Though there are few wild specimens left, the honohono is cultivated and kept as a garden plant in Hawaii.[5]
References

Haplostachys haplostachya. The Nature Conservancy.
USFWS. Determination that three Hawaiian plants are endangered species. Federal Register October 30, 1979.
Morden C. W. and W. Loeffler. (1999). Fragmentation and genetic differentiation among subpopulations of the endangered Hawaiian mint Haplostachys haplostachya (Lamiaceae). Molecular Ecology 8 617-25.
Haplostachys haplostachya. Archived 2010-12-15 at the Wayback Machine Center for Plant Conservation.
Barboza, R. Honohono. Honolulu Star-Bulletin October 8, 2004.