Colubrina oppositifolia, known as kauila in Hawaiian, is a rare species of flowering tree in the family Rhamnaceae endemic to Hawaii.

[4] It can be found in Hawaiian dry, coastal mesic, and mixed mesic forests at elevations of 240–920 m (790–3,020 ft) on the islands of Oʻahu (Waiʻanae Range) and Hawaiʻi (on the slopes of Kohala, Hualālai, and Mauna Loa).

[1] Associated plants include alaheʻe (Psydrax odorata) and ʻohe kukuluāeʻo (Reynoldsia sandwicensis).

Native Hawaiians valued the hard wood of C. oppositifolia and that of a related species, Alphitonia ponderosa, both of which were known as kauila.

It is believed to have been used in pou (house posts), hohoa (round kapa beaters), ʻiʻe kūkū (square kapa beaters), ʻō (harpoons), hiʻa kā ʻupena (fishing net shuttles), ihe paheʻe (javelins), pololū (spears), pāhoa (daggers), lāʻa pālau (clubs), leiomano (shark tooth clubs), ʻōʻō (digging sticks), pieces for ʻume (a wand game), and ʻūkēkē (musical bows).