Hawaiian hibiscus are seven species of hibiscus native to Hawaii. The yellow hibiscus is Hawaii's state flower. Most commonly grown as ornamental plants in the Hawaiian Islands are the non-native Chinese hibiscus (Hibiscus rosa-sinensis) and its numerous hybrids, though the native Hibiscus arnottianus is occasionally planted. The native plants in the genus Hibiscus in Hawaii are thought to have derived from four independent colonization events for the five endemic species (four closely related species plus the yellow-flowered species) and one each for the two indigenous species. Native species The native hibiscus found in Hawaii are: Hibiscus arnottianus A.Gray – kokio keokeo ("kokio that is white like the shine of silver") is an endemic species of hibiscus with white flowers. Three subspecies are recognized: H. arnottianus ssp. arnottianus found in the Waianae Range of western Oahu; H. a. ssp. immaculatus which is very rare (listed as endangered) on Molokai; and H. a. ssp. punaluuensis from the Koolau Range on Oahu. Perhaps only a dozen plants of H. a. ssp. immaculatus exist in nature in mesic and wet forests. This species is closely related to H. waimeae, and the two are among the very few members of the genus with fragrant flowers. It is sometimes planted as an ornamental or crossed with H. rosa-sinensis. In the Hawaiian language, the white hibiscus is known as the pua aloalo. Hibiscus brackenridgei A.Gray – mao hau hele ("hau most similar to mao") is a tall shrub (up to ) with bright yellow flowers, closely related to the widespread H. divaricatus. Two subspecies are recognized: H. b. ssp. brackenridgei, a sprawling shrub to an erect tree found in dry forests and low shrublands at elevations of above sea level on Molokai, Lanai, Maui, and the island of Hawaii; and H. b. ssp. mokuleianus, a tree from dry habitats on Kauai and the Waianae Range on Oahu. This species is listed as an endangered species by the USFWS. The yellow flower of this species was made the official state flower of Hawaii on 6 June 1988, and although endangered in its natural habitats, has become a moderately popular ornamental in Hawaiian yards. Hibiscus clayi O.Deg. & I.Deg. is an endemic shrub or small tree with bright red flowers, generally similar to H. kokio, and found in nature on Kauai in dry forests. It is listed as endangered by USFWS. Hibiscus furcellatus Desr. is a pink-flowered hibiscus considered