Hawaiian hibiscus are seven species of hibiscus native to Hawaii. The yellow hibiscus is Hawaii's state flower. Most commonly grown as ornamental plants in the Hawaiian Islands are the non-native Chinese hibiscus and its numerous hybrids, though the native Hibiscus arnottianus is occasionally planted.
Labordia cyrtandrae, the Koʻolau Range labordia, is a species of flowering plant in the Loganiaceae family. It is endemic to lowland tropical moist forests in Hawaiʻi, and is threatened by habitat loss. Like other Labordia species, this plant is known as Kamakahala.
Melicope saint-johnii, the St. John's pelea or St. John's melicope, is a species of tree in the family Rutaceae. It is endemic to the Hawaiian Islands, where it is present only on the island of Oahu. Like other Hawaiian Melicope, this species is known as alani. It is threatened by habitat loss. It is a federally listed endangered species of the United States.
Euphorbia kuwaleana is a rare species of flowering plant in the euphorb family known by the common name kokomalei. It is endemic to Oahu, Hawaii, where it is known only from a four-kilometer stretch of the Waianae Range. Like other Hawaiian euphorbs, this plant is known locally as `akoko. It is a federally listed endangered species of the United States.
Cyanea longiflora is a rare species of flowering plant in the bellflower family known by the common name ridge rollandia. It is endemic to Oahu where there are only three remaining occurrences in the northern Waianae Mountains for a total of under 300 individuals. It is a federally listed endangered species. Like other Cyanea it is known as haha in Hawaiian.
Delissea subcordata is a rare species of flowering plant in the bellflower family known by the common names Koʻolau Range delissea and oha. It is endemic to Hawaii, where it is known only from the island of Oahu. It is now only found in the Waianae Mountains, and it is believed to be extirpated from the Koʻolau Range, where it once occurred. As of 2008 there were 40 individuals remaining, 28 of which were mature plants. This plant was federally listed as an endangered species of the United States in 1996.
Kadua cookiana is a rare species of flowering plant in the coffee family known by the common names 'awiwi and Cook's bluet. It is endemic to Hawaii, where it is known only from Kauai, having been extirpated from Molokai and Hawaii. It is a federally listed endangered species of the United States.
Kadua coriacea is a rare species of flowering plant in the coffee family known by the common name kioʻele. It is endemic to Hawaii, where it is known only from the island of Hawaiʻi and one individual remaining on Maui. It is a federally listed endangered species of the United States.
Kadua parvula is a rare species of flowering plant in the coffee family known by the common name rockface star-violet. It is endemic to Hawaii, where it is known only from the Waianae Mountains on the island of Oahu. It is a federally listed endangered species of the United States.
Lepidium arbuscula is a rare species of flowering plant in the mustard family known by the common names `anaunau and Waianae Range pepperwort. It is endemic to Hawaii, where it is known only from the Waianae Mountains on the island of Oahu. In 2003 there were ten populations remaining with fewer than 1000 individuals in total. It is a federally listed endangered species of the US.
Melanthera tenuifolia is a rare species of flowering plant in the family Asteraceae known by the common names Waianae Range nehe and slender-leaf nehe.
Lobelia oahuensis is a rare species of flowering plant in the bellflower family known by the common name Oahu lobelia. It is endemic to Hawaii, where it is known only from the island of Oahu. There are about 100 individuals remaining in the Koʻolau Range, and only one known individual in the Waianae Range. It is federally listed as an endangered species of the United States.
Nototrichium humile is a rare species of flowering plant in the family Amaranthaceae known by the common names kaala rockwort and kulu'i. It is endemic to Hawaii, where it is now limited to the island of Oahu, having been extirpated from Maui. It is a federally listed endangered species of the United States.
Phyllostegia hirsuta is a species of flowering plant in the mint family known by the common names Molokai phyllostegia and hairy phyllostegia. It is endemic to Hawaii, where it is known only from the island of Oahu. It is a federally listed endangered species of the United States.
Sanicula mariversa is a rare species of flowering plant in the family Apiaceae known by the common name Waianae Range black-snakeroot. It is endemic to Hawaii, where it is known only from the Waianae Mountains on the island of Oahu. It is threatened by the degradation of its habitat. It is a federally listed endangered species of the United States.
Schiedea hookeri is a rare species of flowering plant in the family Caryophyllaceae known by the common names Hooker's schiedea and sprawling schiedea. It is endemic to Hawaii, where it is known only from the island of Oahu. It is thought to have been extirpated from Haleakalā on Maui. It is threatened by the degradation and destruction of its habitat. It was federally listed as an endangered species of the United States in 1996.
Schiedea kealiae is a rare species of flowering plant in the family Caryophyllaceae known by the common name Waianae Range schiedea. It is endemic to Hawaii, where it is known only from the Waianae Range on the island of Oahu. It is threatened by the degradation and destruction of its habitat. It was federally listed as an endangered species of the United States in 1996.
Silene perlmanii is a rare species of flowering plant in the family Caryophyllaceae known by the common name cliff-face catchfly. It is endemic to Hawaii, where it is known only from the southern Waianae Mountains of Oahu. Today there are no plants left in the wild. The species is in cultivation at the National Tropical Botanical Garden. It is a federally listed endangered species of the United States.
Tetramolopium lepidotum is a rare species of flowering plant in the family Asteraceae known by the common name Waianae Range tetramolopium. It is endemic to Hawaii, where today it is known only from the Waianae Mountains on the island of Oahu. It is threatened by habitat degradation caused by feral goats and pigs and introduced species of plants.
