Haplostachys
| Honohono | |
|---|---|
| Scientific classification | |
| Kingdom: | Plantae | 
| Clade: | Tracheophytes | 
| Clade: | Angiosperms | 
| Clade: | Eudicots | 
| Clade: | Asterids | 
| Order: | Lamiales | 
| Family: | Lamiaceae | 
| Subfamily: | Lamioideae | 
| Genus: | Haplostachys (A.Gray) Hillebr. | 
Haplostachys (honohono) 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."
- 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