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GEOGRAPHY

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Bio - Flora

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Most Endangered Species

This list features the most endangered plants on Planet Earth.

RANK

PLANT

POPULATION

DESCRIPTION

1

Middlemist Red (Middlemist camellia)

Only 2 known plants

One of the rarest flowering plants, with only two known specimens, in the UK and New Zealand.

2

Encephalartos woodii

Extinct in the wild

A cycad species from South Africa, now only survives in botanical gardens; no wild populations remain.

3

Franklin Tree (Franklinia alatamaha)

Extinct in the wild

This small tree from Georgia, USA, has been extinct in the wild since the 1800s; preserved in cultivation.

4

Western Underground Orchid (Rhizanthella gardneri)

50 individuals

A critically endangered Australian orchid that grows entirely underground, endangered by habitat loss.

5

Attenborough’s Pitcher Plant (Nepenthes attenboroughii)

100 individuals

A carnivorous plant found in the Philippines, critically endangered due to habitat destruction.

6

Ghost Orchid (Dendrophylax lindenii)

Less than 1,500 individuals

Native to Florida and Cuba, this rare orchid is endangered due to habitat destruction and illegal collection.

7

Rafflesia arnoldii

1,000 individuals

The largest flower in the world, found in Southeast Asia, endangered due to deforestation.

8

Titan Arum (Amorphophallus titanum)

1,000 individuals

A giant flowering plant from the rainforests of Sumatra, threatened by habitat loss.

9

Monkey Puzzle Tree (Araucaria araucana)

less than 10,000 individuals

A Chilean and Argentine species, facing deforestation and climate threats.

10

Baobab Trees (Adansonia spp.)

Declining

Iconic African trees suffering from population decline due to climate change and overuse.


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References

Brodie, J.F., 2009. The endangered species handbook. Washington, DC: Endangered Species Coalition, pp.120–130. Available at: https://www.endangeredspecieshandbook.org [Accessed 1 December 2025]. Falk, D.A. & Holsinger, K.E., 1991. Genetics and conservation of rare plants. Oxford: Oxford University Press, pp.65–80. Available at: https://global.oup.com/academic/product/genetics-and-conservation-of-rare-plants [Accessed 1 December 2025]. Govaerts, R., 2001. World checklist of seed plants. Kew: Kew Publishing, pp.140–155. Available at: https://www.kew.org/science/world-checklist-seed-plants [Accessed 1 December 2025]. Mabberley, D.J., 2008. Mabberley’s plant-book: A portable dictionary of plants, their classification and uses. Cambridge: Cambridge University Press, pp.450–460. Available at: https://www.cambridge.org/mabberleys-plant-book [Accessed 1 December 2025]. Oldfield, S., 1997. The world list of threatened trees. Cambridge: World Conservation Press, pp.90–110. Available at: https://www.worldconservationpress.org/threatened-trees [Accessed 1 December 2025]. Pimm, S.L. & Raven, P., 2000. Biodiversity—extinction by numbers. Nature, pp.843–845. Available at: https://www.nature.com/articles/35016579 [Accessed 1 December 2025]. Simberloff, D., 2013. Invasive species: What everyone needs to know. Oxford: Oxford University Press, pp.145–160. Available at: https://global.oup.com/invasive-species [Accessed 1 December 2025]. Stewart, A., Pearman, D.A. & Preston, C.D., 1994. Scarce plants in Britain. Peterborough: JNCC, pp.200–220. Available at: https://jncc.gov.uk/scarce-plants-britain [Accessed 1 December 2025]. Willis, K.J., 2017. State of the world's plants 2017. Kew: Royal Botanic Gardens, Kew, pp.85–90. Available at: https://www.kew.org/state-of-the-worlds-plants [Accessed 1 December 2025]. World Conservation Monitoring Centre, 1998. Plants in danger: What do we know? Gland: IUCN, pp.45–55. Available at: https://www.iucn.org/resources/plants-danger [Accessed 1 December 2025].
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