The Hawaiian lobelioids are a group of flowering plants in the bellflower family, Campanulaceae, subfamily Lobelioideae, 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. The six genera involved can be broadly separated based on growth habit: Clermontia are typically branched shrubs or small trees, up to 7 metres (23 ft) tall, with fleshy fruits; Cyanea and Delissea are typically unbranched or branching only at the base, with a cluster of relatively broad leaves at the apex and fleshy fruits; Lobelia and Trematolobelia have long thin leaves down a single, non-woody stem and capsular fruits with wind-dispersed seeds; and the peculiar Brighamia have a short, thick stem with a dense cluster of broad leaves, elongate white flowers, and capsular fruits. The relationships among the genera and sections remains unsettled as of April 2022.
Dubautia arborea, the tree dubautia or Mauna Kea dubautia, is a species of flowering plant in the family Asteraceae. It is endemic to the island of Hawaiʻi. It is a shrub or small tree. It is an endangered species that is threatened by feral grazing animals.
Cyanea is a genus of flowering plants in the family Campanulaceae. The name Cyanea in Hawaiian is hāhā. These Hawaiian lobelioids are endemic to Hawaii with over 90% of Cyanea species are found only on one island in the Hawaiian chain. They grow in moist and wet forest habitat and are largely pollinated by birds such as the Hawaiian honeycreepers, and the seeds are dispersed by birds that take the fruits. Most Cyanea are trees with few branches or none. The inflorescence is a raceme of 4 to 45 flowers which grows from the leaf axils. The fruit is a fleshy berry. There have been several theories regarding the evolution of large prickles on plants endemic to islands that lack any mammalian or reptilian herbivores. One such theory suggests that the prickles are a defense against herbivory by the moa-nalo, a few taxa of flightless ducks that went extinct on the islands within the last 1600 years.
Cyanea grimesiana is a rare species of flowering plant in the bellflower family known by the common name splitleaf cyanea. It is native to Oahu and Molokai, where it is known from 12 occurrences. It is a federally listed endangered species. Like other Cyanea it is known as haha in Hawaiian.
Cyanea humboldtiana is a rare species of flowering plant in the bellflower family known by the common name Oʻahu rollandia. It is native to Oʻahu, where it is known only from the Koʻolau Mountains. It is a federally listed endangered species. Like other Cyanea it is known as haha in Hawaiian.
Cyanea koolauensis is a rare species of flowering plant in the bellflower family known by the common names Palolo Valley rollandia and narrowleaf rollandia. It is native to Oahu, where it is known only from the Koʻolau Mountains. It is a federally listed endangered species. Like other Cyanea it is known as haha in Hawaiian.
Cyanea kuhihewa is a rare species of flowering plant in the bellflower family known by the common name Limahuli Valley cyanea. It is endemic to Kauai, where only two mature plants are known from a single wild population. Like other Cyanea it is known as haha in Hawaiian.
Cyanea lobata is a rare species of flowering plant in the bellflower family known by the common name Waihee Valley cyanea. It is endemic to Hawaii, where it is known from Lanai and Maui. It is a federally listed endangered species. Like other Cyanea it is known as haha in Hawaiian.
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.
Cyanea mceldowneyi is a rare species of flowering plant in the bellflower family known by the common name McEldowney cyanea. It is endemic to Hawaii, where it is known only from the island of Maui. A 2007 count estimated 60 plants remaining in two populations. It was federally listed as an endangered species of the United States in 1992. Like other Cyanea it is known as haha in Hawaiian.
Cyanea remyi is a rare species of flowering plant in the bellflower family known by the common name Remy's cyanea. It is endemic to Hawaii, where it is known only from the island of Kauai. It is a federally listed endangered species of the United States. Like other Cyanea, it is known as haha in Hawaiian.
Cyanea shipmanii is a rare species of flowering plant in the bellflower family known by the common name Shipman's cyanea. It is endemic to the island of Hawaii, where it is known only from the windward slopes of Mauna Loa and Mauna Kea. It is a federally listed endangered species of the United States. Like other Cyanea, it is known as haha in Hawaiian.
Cyanea st.-johnii is a rare species of flowering plant in the bellflower family known by the common name St. John's rollandia. It is endemic to Oahu, where it is known only from the Koʻolau Mountains. It is a federally listed endangered species of the United States. Like other Cyanea it is known as haha in Hawaiian.
Cyanea stictophylla is a rare species of flowering plant in the bellflower family known by the common name Kaiholena cyanea. It is endemic to the island of Hawaii, where it is known only from the rainforests of Mauna Loa. It is a federally listed endangered species of the United States. Like other Cyanea it is known as haha in Hawaiian.
Cyanea truncata is a rare species of flowering plant in the bellflower family known by the common name Punaluu cyanea. It is endemic to the islands of Oahu and Molokai in Hawaii, but it is now critically endangered. It exists in cultivation and some individuals have been planted in appropriate habitat. It is a federally listed endangered species of the United States. Like other Cyanea it is known as haha in Hawaiian.
Cyanea undulata is a rare species of flowering plant in the bellflower family known by the common names wavy cyanea and leechleaf cyanea. It is endemic to the island of Kauai, where it is in rapid decline. It is a federally listed endangered species of the United States. Like other Cyanea it is known as haha in Hawaiian.
Cyrtandra giffardii is a rare species of flowering plant in the African violet family known by the common names forest cyrtandra and Giffard's cyrtandra. It is endemic to the island of Hawaii, where it grows on the slopes of Mauna Kea and Mauna Loa. A 1998 estimate places the total remaining population size around 1000 individual plants. It is a tree which grows 2 to 6 meters tall and bears white flowers. It was federally listed as an endangered species in 1994. Like other Hawaiian Cyrtandra it is called ha`iwale.
Cyanea angustifolia is a plant in the genus Cyanea that is found in Hawaii. Leaves of this species, as well as the endangered ʻakuʻaku, were wrapped in ti (kī) leaves, cooked in an ʻimu and eaten in times of food scarcity by early Hawaiians.
Cyanea marksii, or Marks' cyanea, is a tree in the bellflower family. It is critically endangered. Some think that it is extinct.
Cyanea calycina is a flowering plant in the Campanulaceae family. The IUCN has classified the species as critically endangered. It is native to the Hawaiian Islands. An example is being monitored with a plant cam.
