Hibiscadelphus hualalaiensis NatureServe Explorer Species Reports — NatureServe Explorer is a source for authoritative conservation information on more than 50,000 plants, animals and ecological communtities of the U.S and Canada. NatureServe Explorer provides in-depth information on rare and endangered species, but includes common plants and animals too. NatureServe Explorer is a product of NatureServe in collaboration with the Natural Heritage Network.

ITIS Reports — Hibiscadelphus hualalaiensis ITIS (the Integrated Taxonomic Information System) is a source for authoritative taxonomic information on plants, animals, fungi, and microbes of North America and the world.

FWS Digital Media Library — The U.S. Fish and Wildlife Service’s National Digital Library is a searchable collection of selected images, historical artifacts, audio clips, publications, and video.Hibiscadelphus hualalaiensis (Hualalai hau kuahiwi) is a species of flowering plant in the mallow family, Malvaceae, that is endemic to the Big Island of Hawaii. The last known plant died in 1992, making it most likely extinct in the wild; any remaining plants are threatened by habitat loss. 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 (Pouteria sandwicensis), pāpala (Charpentiera spp.), ʻaiea (Nothocestrum spp.), poʻolā (Claoxylon sandwicense), and Kikuyu Grass (Pennisetum clandestinum). H. hualalaiensis is a small tree, reaching a height of 5–7 m (16–23 ft) and trunk diameter of 30 cm (12 in)