A threatened species is any species which is vulnerable to extinction in the near future. Species that are threatened are sometimes characterised by the population dynamics measure of critical depensation, a mathematical measure of biomass related to population growth rate. This quantitative metric is one method of evaluating the degree of endangerment without direct reference to human activity.
The conservation status of a group of organisms indicates whether the group still exists and how likely the group is to become extinct in the near future. Many factors are taken into account when assessing conservation status: not simply the number of individuals remaining, but the overall increase or decrease in the population over time, breeding success rates, and known threats. Various systems of conservation status are in use at international, multi-country, national and local levels, as well as for consumer use such as sustainable seafood advisory lists and certification. The two international systems are by the International Union for Conservation of Nature (IUCN) and The Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES).
Leucadendron argenteum is an endangered plant species in the family Proteaceae, which is endemic to a small area of the Cape Peninsula, South Africa. Most grow in and around the city of Cape Town, but outlying populations exist near Somerset West (Silwerboomkloof), Paarl and Stellenbosch. It is a protected tree in South Africa.
Colubrina is a genus of about 30 species of flowering plants in the family Rhamnaceae, native to warm temperate to tropical regions of Africa, the Americas, southern Asia, northern Australia, and the Indian Ocean islands.
Colubrina elliptica, also known as mabi or soldierwood, is a species of flowering tree in the family Rhamnaceae that is native to the Florida Keys, the Caribbean, Central America, Mexico, and Venezuela.
Erythrina schliebenii is a species of legume in the family Fabaceae. It is found only in Tanzania. The species is named for German collector and botanist Hans-Joachim Schlieben.
Tephrosia pondoensis is a species of plant in the family Fabaceae. It is found only in the Cape Provinces of South Africa, where it is protected under the National Forest Act of 1998. The pondo poison pea is threatened by habitat loss.
Widdringtonia wallichii, Clanwilliam cedar or Clanwilliam cypress, previously Widdringtonia cedarbergensis is a species of Widdringtonia native to South Africa, where it is endemic to the Cederberg Mountains northeast of Cape Town in Western Cape Province. Due to harsh weather conditions, like limited rainfall and frequent wildfires, growth is limited. Ring width almost correlates with rainfall due to such harsh environmental conditions It is threatened by habitat loss and protected in South Africa under the National Forest Act of 1998.
Widdringtonia schwarzii is a species of Widdringtonia native to South Africa, where it is endemic to the Baviaanskloof and Kouga Mountains west of Port Elizabeth in Eastern Cape Province; it occurs on dry rocky slopes and crags at 600–1,200 m altitude. It is threatened by habitat loss, particularly by wildfire. The Willowmore cypress is a protected tree in South Africa.
Cassipourea swaziensis is a species of plant in the Rhizophoraceae family. It is found in South Africa and Eswatini. It is threatened by habitat loss, and a protected tree in South Africa.
Manilkara nicholsonii is a species of plant in the family Sapotaceae. It is endemic to South Africa (Natal), and is threatened by habitat loss.
Ozoroa namaquensis is a species of plant in the family Anacardiaceae. It is found in Namibia and South Africa. It is threatened by habitat loss, and a protected tree in South Africa.
Protea comptonii, also known as saddleback sugarbush, is a smallish tree of the genus Protea in the family Proteaceae. It is found in South Africa and Eswatini.
Mkhambathi Nature Reserve is a protected area at Lusikisiki in the Eastern Cape, South Africa. It is 7,720 hectares, with the Pondoland Marine Protected Area off its coastal edge. The reserve is located in the Pondoland Centre of Plant Endemism and the greater Maputaland–Pondoland–Albany Hotspot, and is covered in open grassland, dotted with patches of indigenous forest, swamp forests and flanked by the forested ravines of the Msikaba and Mtentu rivers.
Colubrina oppositifolia, known as kauila in Hawaiian, is a rare species of flowering tree in the family Rhamnaceae endemic to Hawaii.
The Maputaland-Pondoland-Albany Hotspot (MPA) is a biodiversity hotspot, a biogeographic region with significant levels of biodiversity, in Southern Africa. It is situated near the south-eastern coast of Africa, occupying an area between the Great Escarpment and the Indian Ocean. The area is named after Maputaland, Pondoland and Albany. It stretches from the Albany Centre of Plant Endemism in the Eastern Cape Province of South Africa, through the Pondoland Centre of Plant Endemism and KwaZulu-Natal Province, the eastern side of Eswatini and into southern Mozambique and Mpumalanga. The Maputaland Centre of Plant Endemism is contained in northern KwaZulu-Natal and southern Mozambique.
Afzelia quanzensis is a species of tree native to sub-Saharan Africa. It ranges from Somalia and Democratic Republic of the Congo to South Africa. It is a protected tree in South Africa.
Breonadia is a monotypic genus of flowering plants in the family Rubiaceae. It was described by Colin Ernest Ridsdale in 1975. The genus contains only one species, viz. Breonadia salicina, which is found in tropical and southern Africa from Mali and Benin east to Ethiopia, south to South Africa, as well as Yemen, Saudi Arabia and Madagascar.
Lydenburgia is a genus of plants in the family Celastraceae.
Lydenburgia abbottii, commonly known as the Pondo bushman's tea, is a rare species of tree only found in two river gorges less than 10 km (6.2 mi) apart on the KwaZulu-Natal / Eastern Cape border, South Africa.
