Acacia koaia

Life-forms

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Rosids
Cladus: Eurosids I
Ordo: Fabales

Familia: Fabaceae
Subfamilia: Caesalpinioideae
Tribus: Acacieae
Genus: Acacia
Species: Acacia koaia
Name

Acacia koaia Hillebr., 1888
Distribution
Native distribution areas:

Continental: Pacific
Regional: Northern Central Pacific
Hawaii

References: Brummitt, R.K. 2001. TDWG – World Geographical Scheme for Recording Plant Distributions, 2nd Edition
References
Primary references

Hillebrand, W. (†). 1888. Flora of the Hawaiian Islands: a description of their phanerogams and vascular cryptogams. London: Williams & Norgate; New York: B. Westermann & Co.; Heidelberg: Carl Winter. BHL Reference page. : 113.

Links

Govaerts, R. et al. 2020. Acacia koaia in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2020 Aug 05. Reference page.
International Plant Names Index. 2019. Acacia koaia. Published online. Accessed: Aug 05 2019.
Tropicos.org 2019. Acacia koaia. Missouri Botanical Garden. Published online. Accessed: 05 Aug 2019.
Hassler, M. Aug. Acacia koaia. World Plants: Synonymic Checklists of the Vascular Plants of the World In: Roskovh, Y., Abucay, L., Orrell, T., Nicolson, D., Bailly, N., Kirk, P., Bourgoin, T., DeWalt, R.E., Decock, W., De Wever, A., Nieukerken, E. van, Zarucchi, J. & Penev, L., eds. Aug. Species 2000 & ITIS Catalogue of Life. Published online. Accessed: Aug 05 {{{3}}}. Reference page.
USDA, ARS, Germplasm Resources Information Network. Acacia koaia in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 09-Oct-10.

Vernacular names
English: Koaiʻa, koaoha
русский: Акация коайа

Acacia koaia, known as koaiʻa or koaiʻe in Hawaiian, is a tree in the pea family, Fabaceae, that is endemic to Hawaii. It is closely related to koa (A. koa), and is sometimes considered to be the same species.

Description

Acacia koaia is usually distinguished by growing as a short (rarely more than 5 m or 16 ft), broad, gnarled tree; having the seeds longitudinally arranged in the pod; shorter, straighter phyllodes; and much denser wood. A population on the northern coast of Kauaʻi may be intermediate, but the relationships have not been worked out. Koaiʻa wood is claimed to be very different from that of koa, and this may be the best character to separate them.
Distribution

Acacia koaia, Koaiʻa, is highly adapted to dry habitats, and is capable of forming dense forests in areas with very little rainfall. It was formerly found widely in dry forests on all of the main islands. Associated plants include uluhe (Dicranopteris linearis), hala (Pandanus tectorius), koʻokoʻolau (Bidens spp.), kokiʻo (Hibiscus kokio), nehe (Lipochaeta spp.), hala pepe (Dracaena spp.), and ʻōhiʻa lehua (Metrosideros polymorpha).[2]

Like many legumes, koaiʻa is able to fix nitrogen.[3] However, it has been devastated by cattle and other ungulates and is now rare. It can be seen on ranch land in North Kohala, and at a small fenced exclosure outside of Waimea known as the koaiʻa sanctuary. Koaiʻa is one of the species being used to revegetate the island of Kahoʻolawe, which lost most of its plant life to overgrazing and ordnance testing.[4]
Uses
Medicinal

Native Hawaiians ground koaiʻa leaves and bark with ʻauʻaukoʻi (Senna occidentalis) and kikānia pipili (Desmodium sandwicense) stalks. The mixture was then hydrated and used in a steam bath to treat diseased skin.[5]
Non-medicinal

The wood of koaiʻa is harder and more dense than that of koa.[6] It was used to make laʻau melomelo (fishing lures), hoe (paddles), ihe (short spears), pololu (long spears), ʻōʻō (digging sticks), ʻiʻe kūkū (square kapa beaters), and papa olonā (Touchardia latifolia scrapers). Koaiʻa leaves were used to cover hale lau koaiʻe (shelters and permanent sheds).[7]

References

"Acacia koaia". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 2009-11-16.
"Acacia koaia". CPC National Collection Plant Profiles. Center for Plant Conservation. 2008-07-22. Archived from the original on 2010-10-28. Retrieved 2009-11-16.
"Acacia koaia". Meet the Plants. National Tropical Botanical Garden. Archived from the original on 2011-07-24. Retrieved 2009-03-28.
Enomoto, Kekoa Catherine (2008-02-17). "Volunteers visit regreened Kahoolawe". The Maui News. Archived from the original on 25 March 2009. Retrieved 2009-03-28.
"koaia, (koaia, koaie, koaoha)". Hawaiian Ethnobotany Online Database. Bernice P. Bishop Museum. Archived from the original on 2007-07-02. Retrieved 2009-02-03.
Elevitch, Craig R.; Wilkinson, Kim M.; Friday, J. B.; Porter, C. Baron (April 2006). "Acacia koa (koa) and Acacia koaia (koaiʻa)" (PDF). The Traditional Tree Initiative.

Medeiros, A. C.; Davenport, C.F.; Chimera, C.G. (1998). "Auwahi: Ethnobotany of a Hawaiian Dryland Forest" (PDF). Cooperative National Park Resources Studies Unit, University of Hawaiʻi at Mānoa. pp. 28–29.

Wagner, W. L.; D. R. Herbst; S. H. Sohmer (1990). Manual of the Flowering Plants of Hawaii. Honolulu: University of Hawaii Press.