Pritchardia viscosa, the stickybud pritchardia or loʻulu, is an extremely rare endangered species of Pritchardia palm that is endemic to the Hawaiian island of Kauaʻi.
Spelaeorchestia koloana, the Kauaʻi cave amphipod or ʻuku noho ana in Hawaiian, is a cave-dwelling crustacean only found on the Hawaiian island of Kauaʻi. It is eyeless and measures 7–10 mm (0.28–0.39 in) long. It is only known from 10 populations, and eats decaying plant matter and other decomposing material.
Canavalia napaliensis, commonly known as the Mākaha Valley Jack-bean, is a species of flowering plant in the pea family, Fabaceae, that is endemic to Hawaii. It was previously more widespread in the archipelago and could be found in Oʻahu's Mākaha Valley, but is today restricted to northwestern Kauaʻi. This and other Hawaiian Canavalia are known there as ʻāwikiwiki.
Melicope haupuensis is a species of tree in the family Rutaceae known by the common names Haupa Mountain melicope and Pacific pelea. It is endemic to the Hawaiian Islands, where it is known only from the island of Kauai. It is threatened by habitat loss. It is a federally listed endangered species of the United States. Like other Hawaiian Melicope, this species is known as alani.
Melicope knudsenii, commonly known as Olokele Valley melicope or Knudsen's melicope, is a species of flowering plant in the family Rutaceae, that is endemic to Hawaii. It inhabits montane mesic forests dominated by Acacia koa, Metrosideros polymorpha, and Dicranopteris linearis on Kauaʻi and East Maui (Auwahi). Associated plants include Syzygium sandwicensis, Cheirodendron trigynum, Myrsine lessertiana, Ilex anomala, Alphitonia ponderosa, Zanthoxylum dipetalum, Kadua terminalis, Pleomele aurea, Bobea spp., Tetraplasandra waimeae, Xylosma hawaiiense, Eurya sandwicensis, Psychotria mariniana, Melicope anisata, Melicope barbigera, Pouteria sandwicensis, Dodonaea viscosa, and Dianella sandwicensis. It is threatened by habitat loss. Like other Hawaiian Melicope, this species is known as alani. This is a federally listed endangered species of the United States.
Melicope paniculata, the Lihue melicope, is a rare species of tree in the family Rutaceae. It is endemic to the Hawaiian Islands. Like other Hawaiian Melicope, this species is known as alani.
Melicope puberula, the hairy melicope, is a species of plant in the family Rutaceae. It is endemic to the Hawaiian Islands. Like other Hawaiian Melicope, this species is known as alani. In 2010 it was added to the endangered species list of the United States.
Myrsine knudsenii, the Kokee colicwood, is a species of tree in the primrose family. It is endemic to the island of Kauai in Hawaii. It is threatened by habitat loss.
Myrsine mezii, the Hanapepe River colicwood, is a species of tree in the primrose family. It is endemic to the island of Kauai in Hawaii. It is threatened by habitat loss. It is a federally listed endangered species of the United States.
Pittosporum napaliense, the royal cheesewood, is a species of plant in the Pittosporaceae family. It is endemic to Hawaii, where it is known only from northwestern Kauai. It became a federally listed endangered species in 2010.
Psychotria greenwelliae, the Kauai wild coffee, is a species of plant in the family Rubiaceae. It is endemic to the islands of Kauai and Oahu in Hawaii. It is threatened by habitat loss.
Psychotria hobdyi, the milolii kopiwai, Hobdy's wild-coffee or kopiko, is a species of plant in the family Rubiaceae. It is endemic to the Hawaiian Islands, where it is known only from the island of Kauai. There are about 10 populations for a total of about 120 individuals. It is threatened by habitat loss and was federally listed as an endangered species of the United States in 2010.
Pteralyxia kauaiensis, also called Kaulu or Kauaʻi pteralyxia, is a species of plant in the family Apocynaceae. It is endemic to the island of Kauaʻi in the Hawaiian Islands. It is threatened by habitat loss and degradation. There are no more than 1000 individuals remaining. It is federally listed as an endangered species of the United States.
Cyanea dolichopoda was a species of shrub in the bellflower family that was endemic to Kauai. It was discovered in 1990 and has not been located in the wild since 1992. Like other Cyanea it is known as haha in Hawaiian.
Cyanea eleeleensis was a rare species of flowering plant in the bellflower family known by the common name Eleele cyanea. It was endemic to Kauai, where it has been declared extinct. It was federally listed as a critically endangered species of the United States in 2010. Like other Cyanea it is known as haha in Hawaiian.
Cyrtandra oenobarba is a rare species of flowering plant in the African violet family known by the common name shaggystem cyrtandra. It is endemic to Hawaii, where it is known only from the island of Kauai. It can be found in only three localized areas of the island and there are fewer than 500 individuals remaining in the wild. It was federally listed as an endangered species in 2010. Like other Hawaiian Cyrtandra it is called ha`iwale.
Delissea rhytidosperma, is known by the common names Kauai delissea, Kauai leechleaf delissea, and leechleaf delissea. It is a rare species of flowering plant in the bellflower family, that is endemic to Hawaii where it is known only from the island of Kauai. It is critically endangered or extinct in the wild.
Geranium kauaiense is a rare species of geranium known by the common name Kauai geranium. It is endemic to Hawaii, where it is known only from the island of Kauai. It was federally listed as an endangered species in 2010. Like other Hawaiian geraniums, this plant is known as hinahina and nohoanu.
Myrsine linearifolia is a rare species of flowering plant in the primrose family known by the common name narrowleaf colicwood. It is endemic to Hawaii, where it is known only from the island of Kauai. There are 12 populations remaining, for a total of fewer than 200 plants. Like other Hawaiian Myrsine this plant is called kōlea. It is a federally listed threatened species of the United States.
Poa mannii is a rare species of grass known by the common names Mann's bluegrass and Olokele Gulch bluegrass. It is endemic to Hawaii, where it is limited to the island of Kauai. It is threatened by the loss and modification of its habitat. It is a federally listed endangered species of the United States.
