The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, founded in 1964, is an inventory of the global conservation status and extinction risk of biological species. A series of Regional Red Lists, which assess the risk of extinction to species within a political management unit, are also produced by countries and organizations.
An IUCN Red List Critically Endangered species is one that has been categorized by the International Union for Conservation of Nature as facing an extremely high risk of extinction in the wild. As of December 2023, of the 157,190 species currently on the IUCN Red List, 9,760 of those are listed as Critically Endangered, with 1,302 being possibly extinct and 67 possibly extinct in the wild.
The Saint Helena olive is an extinct species of flowering plant. It is the only member of the genus Nesiota. It was endemic to the island of Saint Helena in the South Atlantic Ocean. Despite its name, it is unrelated to the true olive, but is instead a member of the family Rhamnaceae, the family which contains buckthorns and jujube. The last remaining tree in the wild died in 1994, and the last remaining individual in cultivation died in December 2003, despite conservation efforts. It is thus a prime example of recent plant extinction. The Saint Helena olive belongs to the tribe Phyliceae, which are mostly endemic to Southern Africa.
Bertiera is a genus of flowering plants in the family Rubiaceae. It comprises 57 species with most known from tropical Africa, five known from various Indian Ocean islands and five found in the tropics of the Americas.
Byrsophyllum tetrandrum is a species of plant in the family Rubiaceae. It is native to Kerala and Tamil Nadu in India. Its habitat has been damaged from exposure to fires, animal grazing, commercial agriculture and deforestation.
Guettarda retusa, also called cuero, is an extinct species of plant in the family Rubiaceae that was endemic to two separate locations in Pinar del Río Province, Cuba. It became extinct due to habitat loss.
Ixora saulierei is a species of flowering plant in the family Rubiaceae. It is endemic to Tamil Nadu in India.
Lasianthus ciliatus is a species of plant in the family Rubiaceae. It is endemic to Tamil Nadu in India.
Nostolachma crassifolia is a species of plant in the family Rubiaceae.
Psychotria globicephala is a species of plant in the family Rubiaceae. It is native to Kerala and Tamil Nadu in India.
Psychotria macrocarpa is a species of plant in the family Rubiaceae. It is native to Kerala and Tamil Nadu in India.
Tarenna monosperma is a species of plant in the family Rubiaceae. It is native to Kerala and Tamil Nadu in India.
Wendlandia andamanica is a species of plant in the family Rubiaceae. It is endemic to the Andaman Islands. It is threatened by habitat loss.
Wendlandia is a genus of flowering plants in the family Rubiaceae. It is found in northeastern tropical Africa, and from tropical and subtropical Asia to Queensland.
Wendlandia arabica is a species of plant in the family Rubiaceae. It is found in Somalia and Yemen, and is threatened by habitat loss.
Begonia eiromischa, commonly known as woolly-stalked begonia, is a presumed extinct plant from Malaysia.
The lenis woolly bat is a species of bat in the family Vespertilionidae. It is found in South and Southeast Asia.
