Phyllostegia kaalaensis, the Kaala phyllostegia, is a species of flowering plant in the mint family, Lamiaceae, that is endemic to the island of Oahu in Hawaii. It can be found in mesic forests on the slopes of the Waianae Range at elevations of . In 2003 there were 36 or 37 individuals remaining. By 2008 all wild individuals were thought to have been extirpated. Some plants are in propagation and have been planted in appropriate habitat. References kaalaensis Endemic flora of Hawaii Critically endangered plants Taxonomy articles created by Polbot