A grove of koa trees is pictured on Haleakala Ranch land. Since 2015, the ranch has been planting native koa trees in an effort to “shade out” gorse, an invasive thorny shrub that grows in ...
Janis Haraguchi, an Institute of Pacific Islands Forestry biologist, measures the diameter of an Acacia koa tree. Haraguchi and other US Forest Service scientists found the stem diameter of koa ...
An extensive search fails to produce koa trees large enough for the hulls. The once plentiful forests on the island of Hawai’i have been depleted, and the unique koa ecosystem virtually destroyed.
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