Parameter the largest of native forest trees (Acacia koa), with light-gray bark, crescent-shaped leaves, and white flowers in small, round heads; a legume with fine, red wood, a valuable timber tree, formerly used for canoes, surfboards, calabashes, now for furniture and ukuleles. A small koa was sometimes added to the hula altar to Laka, goddess of the hula, to make the dancer fearless. [ab1be3e99250a1f8cf4dddbb2054523f]