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Acacia koa, commonly known as koa, [3] is a species of flowering tree in the family Fabaceae. It is endemic to the Hawaiian Islands , [ 2 ] where it is the second most common tree. [ 4 ] The highest populations are on Hawaiʻi , Maui and Oʻahu .
Acacia koa (koa) [10] An evergreen with highly valued wood: unusually colorful, with a curvy grain and good woodworking properties. The tree grows naturally only in Hawaii, where it is an important part of mountainous rainforests. Uses: timber; landscaping, sap resins, veneers. [11] —
Taiwan acacia (Acacia confusa), also known as Formosan koa and Asian walnut, is a hardwood species native to Taiwan. It is challenging to work and for this reason was traditionally burned as firewood or turned into charcoal.
For hardwood flooring, the test usually requires an 80 mm × 150 mm (3 in × 6 in) sample with a thickness of at least 6–8 mm, and the most commonly used test is the ASTM D1037. When testing wood in lumber form, the Janka test is always carried out on wood from the tree trunk (known as the heartwood), and the standard sample (according to ...
American Hardwood Information Center; American Hardwood Export Council; Australian National Association of Forest Industries; Canadian Wood Group;
The wood of koaiʻa is harder and more dense than that of koa. [6] It was used to make laʻau melomelo (fishing lures), hoe (), ihe (short spears), pololu (long spears), ʻōʻō (digging sticks), ʻiʻe kūkū (square kapa beaters), and papa olonā (Touchardia latifolia scrapers).