The Mariana mallard or Oustalet's duck is an extinct species of duck of the genus Anas that was endemic to the Mariana Islands. Its taxonomic status is debated, and it has variously been treated as a full species, a subspecies of the mallard or of the Pacific black duck, or sometimes as a subspecies of the Indian spot-billed duck.
The Santa Cruz cypress is a species of North American tree within the Cypress family. The species is endemic to the Santa Cruz Mountains within the Santa Cruz and San Mateo counties of west-central California. The U.S. Fish and Wildlife Service listed the species on the Endangered Species Act in 1987 due to increasing threats from habitat loss and disruption of natural forest fire regimes. In 2016, the conservation status of the Santa Cruz cypress changed to Threatened. The cited reasoning was a decrease in threats against their habitat.
Amaranthus brownii was an annual herb in the family Amaranthaceae. The plant was found only on the small island of Nihoa in the Northwestern Hawaiian Islands, growing on rocky outcrops at altitudes of 120–215 m (394–705 ft). It was one of nine species of Amaranthus in the Hawaiian Islands, as well as the only endemic Hawaiian species of the genus. It is now considered extinct.
The Mariana fruit dove, totot on Guam or Paluman totut in Northern Marianas Islands, also known as mwee’mwe in the Carolinian language, is a small, up to 24 cm long, green fruit dove native and endemic to Guam and the Northern Marianas Islands in the Pacific. It has a red forehead; greyish head, back and breast; and yellow belly patch and undertail coverts.
Serianthes nelsonii is a large tree endemic to Guam and Rota of the Mariana Islands. Only one mature tree exists on Guam, while 121 mature trees have been identified on Rota since 1984.
The bridled white-eye is a species of white-eye native to the Mariana Islands and formerly Guam. The species' natural habitat is subtropical or tropical moist lowland forests.
Eugenia woodburyana is a species of plant in the family Myrtaceae. It is endemic to Puerto Rico. It is a federally listed endangered species of the United States. It is threatened by habitat loss.
Melicope ovalis, the wild pelea or Hana melicope, is a species of tree in the family Rutaceae. It is endemic to Maui, of the Hawaiian Islands.
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 zahlbruckneri, with the common names Zahlbruckner's melicope, Zahlbruckner's pelea, and kipuka piaula, is a species of tree in the family Rutaceae.
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.
Schoepfia arenaria is an extremely rare species of hemiparasitic flowering plant in the Schoepfiaceae family. It grows as a small, multi-trunked tree. It is endemic to Puerto Rico, where it is found growing along the northern coast. A local Spanish vernacular name recorded for this tree is araña ('spider'). It has no common name in English.
Trichilia triacantha, the bariaco, is a species of plant in the Meliaceae family endemic to Puerto Rico.
Cornutia obovata is a rare species of tree in the mint family, and formerly considered a member of the verbena family. It is endemic to forested slopes in Puerto Rico, where its common names are capá jigüerilla, nigua, and palo de nigua. When it was added to the endangered species list of the United States in 1988 there were only seven individuals known to remain in the wild. By 1998 there were eight plants known. This is considered one population divided amongst a few locations in the mountain forests of the island.
Dubautia kenwoodii, the Kalalau rim dubautia, is an "extremely rare" species of flowering plant in the family Asteraceae. It is endemic to Hawaii where it is known only from the island of Kauai. Only one plant has ever been seen: the type specimen. A part of this plant was collected in 1991 and the individual was described as a new species in 1998. It was federally listed as an endangered species of the United States in 2010. Like other Dubautia this plant is known as na`ena`e.
Nesogenes rotensis is a rare species of flowering plant in the family Orobanchaceae. It is endemic to Rota, one of the Northern Mariana Islands in the Pacific Ocean. An inhabitant of the commonwealth, it was federally listed as an endangered species of the United States in 2004.
Tabernaemontana pandacaqui, known as windmill bush and banana bush, is a species of plant in the dogbane family Apocynaceae.
Dendrobium guamense is a species of epiphytic orchid endemic to Guam and the Commonwealth of the Northern Mariana Islands. It is currently known from nine occurrences totaling 550 individuals across the islands of Guam, Rota, Tinian, and Saipan.
The Marianas tropical dry forests is a tropical and subtropical dry broadleaf forests ecoregion on the Marianas Islands in the western Pacific Ocean.
