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Plant Profile

Hairy Phyllostegia (Phyllostegia hirsuta)

Phyllostegia hirsuta, Kalua'a Gulch, O'ahu, endemic. Photo Credit: J. K. Obata © 2005
  • Global Rank: G1 - Critically Imperiled
  • Legal Status: Federally Endangered
  • Family: Lamiaceae
  • State: HI
  • Nature Serve ID: 140097
  • Lifeform: Subshrub, Shrub, Vine
  • Date Inducted in National Collection:

With stems covered in coarse hairs, this flowering subshrub or vine sprawls through vegetation and along the ground of the slopes, gulches, ravines. Dainty white flowers grow along this stems, showcasing an upper lipped petal with a small purple detail. The remaining populations' biggest threats are feral pigs and goats contributing to habitat fragmentation, as well as competition for resources with introduced plant species.

Where is Hairy Phyllostegia (Phyllostegia hirsuta) located in the wild?


Typical habitat of this Phyllostegia species features steep, shaded slopes in mesic to wet forests dominated by ohia or a mixture of ohia and uluhe between 1,970 and 3,610 ft.


This member of the mint family is endemic to Oahu, with about 300 individuals spread across the Ko'olau and Wai'anae Mountains.

States & Provinces:

Hairy Phyllostegia can be found in Hawaii

Which CPC Partners conserve Hairy Phyllostegia (Phyllostegia hirsuta)?

CPC's Plant Sponsorship Program provides long term stewardship of rare plants in our National Collection. We are so grateful for all our donors who have made the Plant Sponsorship Program so successful. We are in the process of acknowledging all our wonderful plant sponsorship donors on our website. This is a work in progress and will be updated regularly.

Conservation Actions

  • 01/01/2010

habitat degradation and/or destruction by feral pigs; potential impacts from military activities; and competition with Christmas berry, Koster's curse, lantana, prickly Florida blackberry, and strawberry guava

  • 01/01/2010

known from 16 populations totaling 150-200 individuals. Several populations number between 20-30 individuals; however, at least 11 populations number fewer than 3 individuals

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Taxon Phyllostegia hirsuta
Authority Benth.
Family Lamiaceae
CPC Number 3423
ITIS 196163
Duration Perennial
Common Names Hairy Phyllostegia | Molokai phyllostegia
Associated Scientific Names Phyllostegia hirsuta var. laxior | Phyllostegia hirsuta | Phyllostegia laxior | Phyllostegia ternaria
Distribution This member of the mint family is endemic to Oahu, with about 300 individuals spread across the Ko'olau and Wai'anae Mountains.
State Rank
State State Rank
Hawaii S1
Ecological Relationships

Lead Institution State Reintroduction Type Year of First Outplanting
Oahu Army Natural Resources Program Hawaii Reinforcement 2013
Oahu Army Natural Resources Program Hawaii Reinforcement 2014
Oahu Army Natural Resources Program Hawaii Reintroduction 2014

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