Hibiscus brackenridgei A.Gray–maʻo hau hele("haumost similar tomaʻo") is a tall shrub (up to 10 m or 33 ft) 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 400–2,600 ft (120–790 m) 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 flowerof Hawaii on 6 June 1988,and although endangered in its natural habitats, has become a moderately popular ornamental in Hawaiian yards.
