Myrsine knudsenii in 2010. Myrsine knudsenii Myrsine knudsenii, the Kokee colicwood, is a species of tree in the primrose family. It is endemic to the island of Kauai in Hawaii. It is threatened by habitat loss. This is a shrub or tree growing up to 4.5 meters tall with flowers occurring in clusters along the branches. It grows in moist forests dominated by "Acacia koa", "Metrosideros polymorpha", and "Dicranopteris linearis". It probably once occurred in several other types of ecosystem. There are three populations left, for a total of about 30 trees. It was federally listed as an endangered species of the
Acacia koa reaching in five years on a good site. Initially, bipinnately compound leaves with 12–24 pairs of leaflets grow on the koa plant, much like other members of the pea family. At about 6–9 months of age, however, thick sickle-shaped "leaves" that are not compound begin to grow. These are phyllodes, blades that develop as an expansion of the leaf petiole. The vertically flattened orientation of the phyllodes allows sunlight to pass to lower levels of the tree. True leaves are entirely replaced by long, wide phyllodes on an adult tree. Flowers of the koa tree are pale-yellow spherical racemes with