Clermontia samuelii is a rare species of flowering plant in the bellflower family

Campanulaceae

The family Campanulaceae , of the order Asterales, contains about 2000 species in 70 genera of herbaceous plants, shrubs, and rarely small trees, often with milky non-toxic sap...

 known by the common name Hana clermontia. It is one of several Hawaiian lobelioids

Hawaiian lobelioids

The Hawaiian lobelioids are a group of flowering plants in the bellflower family, Campanulaceae, all of which are endemic to the Hawaiian Islands. This is the largest plant radiation in the Hawaiian Islands, and indeed the largest on any island archipelago, with over 125 species...

 in genus Clermontia that are known as `oha wai. This plant is endemic to Maui

Maui

The island of Maui is the second-largest of the Hawaiian Islands at and is the 17th largest island in the United States. Maui is part of the state of Hawaii and is the largest of Maui County's four islands, bigger than Lānai, Kahoolawe, and Molokai. In 2010, Maui had a population of 144,444,...

, where there are fewer than 250 mature specimens remaining. This is a federally listed endangered species

Endangered species

An endangered species is a population of organisms which is at risk of becoming extinct because it is either few in numbers, or threatened by changing environmental or predation parameters...

 of the United States.

This is a shrub

Shrub

A shrub or bush is distinguished from a tree by its multiple stems and shorter height, usually under 5–6 m tall. A large number of plants may become either shrubs or trees, depending on the growing conditions they experience...

 which can reach five meters in height. It grows in wet Metrosideros

Metrosideros

Metrosideros is a genus of approximately 50 trees, shrubs, and vines native to the islands of the Pacific Ocean, from the Philippines to New Zealand and including the Bonin Islands, Polynesia, and Melanesia, with an anomalous outlier in South Africa. Most of the tree forms are small, but some are...

forests. Some individuals are protected within Haleakalā National Park

Haleakala National Park

Haleakalā National Park is a United States national park located on the island of Maui in the state of Hawaii. The park covers an area of , of which is a wilderness area...

. Threats to the species include invasive plant species

Invasive species

"Invasive species", or invasive exotics, is a nomenclature term and categorization phrase used for flora and fauna, and for specific restoration-preservation processes in native habitats, with several definitions....

 such as glory bush (Tibouchina herbacea) and Vaseygrass

Paspalum urvillei

Paspalum urvillei is a species of grass known by the common name Vasey's grass, or Vaseygrass. It is native to South America, and it is known in parts of North America as an introduced species. It is a noxious weed where it has been introduced in Hawaii and New Caledonia. It grows well in disturbed...

 (Paspalum urvillei), and feral pigs, which inflict severe damage upon the ecosystem.