Hibiscadelphus hualalaiensis (Hualalai hau kuahiwi)[3] is a species of flowering plant in the mallow family Malvaceae that is endemic to the Big Island of Hawaii.

H. hualalaiensis is a small tree, reaching a height of 5–7 m (16–23 ft) and trunk diameter of 30 cm (12 in).

[4] It inhabits dry and mixed mesic forests on the slopes of Hualālai at elevations of 915–1,020 m (3,002–3,346 ft).

Associated plants include ʻōhiʻa lehua (Metrosideros polymorpha), lama (Diospyros sandwicensis), māmane (Sophora chrysophylla), naio (Myoporum sandwicense), ʻālaʻa (Planchonella sandwicensis), pāpala (Charpentiera spp.

However, individuals have been breed in captivity and replanted in nature reserves of the Big Island.