Kauila refers to two species of trees in the

buckthorn ''Rhamnus'' is a genus of about 110 accepted species of shrubs or small trees, commonly known as buckthorns, in the family Rhamnaceae. Its species range from tall (rarely to ) and are native mainly in east Asia and North America, but found thr ...

family,

Rhamnaceae The Rhamnaceae are a large family of flowering plants, mostly trees, shrubs, and some vines, commonly called the buckthorn family. Rhamnaceae is included in the order Rosales. The family contains about 55 genera and 950 species. The Rhamnaceae h ...

, that are

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

Hawaii Hawaii ( ; haw, Hawaii or ) is a state in the Western United States, located in the Pacific Ocean about from the U.S. mainland. It is the only U.S. state outside North America, the only state that is an archipelago, and the only stat ...

: ''

Alphitonia ponderosa ''Alphitonia ponderosa'' is a species of Flowering plant, flowering tree in the family Rhamnaceae, that is Endemism, endemic to the Hawaiian Islands. It is locally known as ''kauila'', as is the related ''Colubrina oppositifolia''. Description ...

'' and ''

Colubrina ''Colubrina'' is a genus of about 30 species of flowering plants in the family Rhamnaceae, native to warm temperate to tropical regions of Africa, the Americas, southern Asia, northern Australia, and the Indian Ocean islands. Common names include ...

oppositifolia''. Their wood was prized for being extremely hard, and is so dense that it sinks in water. Both occur in dry to mesic forest and are now rare; ''C. oppositifolia'' is listed as Endangered. Also see

Metrosideros polymorpha ''Metrosideros polymorpha'', the ''ōhia lehua'', is a species of flowering evergreen tree in the myrtle family, Myrtaceae, that is endemic to the six largest islands of Hawaii. It is a highly variable tree, being tall in favorable situations, ...

References

*Wagner, W. L., D. R. Herbst, and S. H. Sohmer. 1990. Manual of the Flowering Plants of Hawaii. University of Hawaii Press, Honolulu Rhamnaceae Trees of Hawaii Plant common names Hawaiian words and phrases Endemic flora of Hawaii {{Rhamnaceae-stub