Hibiscadelphus hualalaiensis is a species of flowering plant

Flowering plant

The flowering plants , also known as Angiospermae or Magnoliophyta, are the most diverse group of land plants. Angiosperms are seed-producing plants like the gymnosperms and can be distinguished from the gymnosperms by a series of synapomorphies...

 in the mallow

Malva

Malva is a genus of about 25–30 species of herbaceous annual, biennial, and perennial plants in the family Malvaceae , one of several closely related genera in the family to bear the common English name mallow. The genus is widespread throughout the temperate, subtropical and tropical regions of...

 family, Malvaceae

Malvaceae

Malvaceae, or the mallow family, is a family of flowering plants containing over 200 genera with close to 2,300 species. Judd & al. Well known members of this family include okra, jute and cacao...

, that is endemic to the Big Island

Hawaii (island)

The Island of Hawaii, also called the Big Island or Hawaii Island , is a volcanic island in the North Pacific Ocean...

 of Hawaii

Hawaii

Hawaii is the newest of the 50 U.S. states , and is the only U.S. state made up entirely of islands. It is the northernmost island group in Polynesia, occupying most of an archipelago in the central Pacific Ocean, southwest of the continental United States, southeast of Japan, and northeast of...

. The last known plant died in 1992, making it most likely extinct in the wild

Extinct in the Wild

Extinct in the Wild is a conservation status assigned to species or lower taxa, the only known living members of which are being kept in captivity or as a naturalized population outside its historic range.-Examples:...

; any remaining plants are threatened by habitat loss. It inhabits dry and mixed mesic forests on the slopes of Hualālai

Hualalai

Hualālai is a dormant shield volcano on the island of Hawaii in the Hawaiian Islands. It is the third-youngest and the third most active of the five volcanoes that form the island of Hawaii, following Kīlauea and the much larger Mauna Loa, and also the westernmost. Its peak is above sea...

 at elevations of 915–1020 m (3,002–3,346.5 ft). Associated plants include ōhia lehua (Metrosideros polymorpha

Metrosideros polymorpha

The ōhia lehua is a species of flowering evergreen tree in the myrtle family, Myrtaceae, that is endemic to the six largest islands of Hawaii. It is a highly variable tree, being tall in favorable situations, and much smaller when growing in boggy soils or on basalt...

), lama (Diospyros sandwicensis

Diospyros sandwicensis

Diospyros sandwicensis is a species of flowering tree in the ebony family, Ebenaceae, that is endemic to Hawaii. Its common name, Lama, also means enlightenment in Hawaiian. Lama is a small to medium-sized tree, with a height of and a trunk diameter of . It can be found in dry, coastal mesic,...

), māmane (Sophora chrysophylla

Mamane

Sophora chrysophylla, known as Māmane in Hawaiian, is a species of flowering plant in the pea and bean family, Fabaceae, that is endemic to Hawaii. It is highly polymorphic, growing as a shrub or tree, and able to reach a height of in tree form. Yellow flowers are produced in winter and...

), naio (Myoporum sandwicense

Myoporum sandwicense

Myoporum sandwicense is a species of flowering tree in the figwort family, Scrophulariaceae. Common names include Naio, bastard sandalwood or false sandalwood. It is native to Hawaii and Mangaia in the Cook Islands.-Description:...

), ālaa (Pouteria

Pouteria

Pouteria is a genus of flowering trees in the gutta-percha family, Sapotaceae. The genus is widespread throughout the tropical regions of the world. It includes the Canistel , the Mamey Sapote and the Lúcuma...

 sandwicensis

Pouteria sandwicensis

Pouteria sandwicensis is a species of flowering tree in the sapodilla family, Sapotaceae, that is endemic to the main islands of Hawaii. Names for this species in the Hawaiian language include Ālaa, Āulu and Ēlaa....

), pāpala (Charpentiera

Charpentiera

Charpentiera is a flowering plant genus in the pigweed family, Amaranthaceae. It consists of five species endemic to Hawaii, where they are known as pāpala, and one species found only on the island of Tubuai in the Austral Islands...

spp.), aiea (Nothocestrum

Nothocestrum

Nothocestrum is a genus of flowering plants in the nightshade family, Solanaceae. It contains four species of large shrubs or small trees that are endemic to Hawaii, where they are known as aiea.-Species:...

spp.), poolā (Claoxylon

Claoxylon

Claoxylon is a flowering plant genus in the spurge family, Euphorbiaceae, comprising dioecious subshrubs to small trees. The genus comprises about 80 species, distributed in paleotropical areas: Madagascar through South and Southeast Asia, Malesia to Melanesia, Hawaii, and Australia. Half of the...

 sandwicense), and Kikuyu Grass (Pennisetum clandestinum

Pennisetum clandestinum

The tropical grass species Pennisetum clandestinum is known by several common names, most often kikuyu grass, as it is native to the region of East Africa that is home to the Kĩkũyũ tribe. Because of its rapid growth and aggressive nature, it is categorised as a noxious weed in some regions...

). H. hualalaiensis is a small tree

Tree

A tree is a perennial woody plant. It is most often defined as a woody plant that has many secondary branches supported clear of the ground on a single main stem or trunk with clear apical dominance. A minimum height specification at maturity is cited by some authors, varying from 3 m to...

, reaching a height of 5–7 m (16.4–23 ft) and trunk diameter of 30 cm (11.8 in).