Tragia pogostemonoides Radcl.-Sm.
Taxonomy & Nomenclature
Conservation Status
Missing (Beentje et al., 2020)
Last record: 1937 (Beentje et al., 2020)
IUCN RedList status: Critically Endangered (Possibly Extinct)
Distribution & Habitat
Tanzania
Biology & Ecology
Hypodigm
Media
References
Beentje, H. J., Gereau, R. E., Hilton-Taylor, C., Howard, G., Kindeketa, W., Luke, W. R. Q., Maunder, M., Mwachala, G., Mwangoka, M., Ndangalasi, H., Njau, E.-F., Schatz, G. E., Siro Masinde, P. and Wilkins, V. L. (2020). Tragia pogostemonoides. The IUCN Red List of Threatened Species 2020: e.T158021A757412. https://dx.doi.org/10.2305/IUCN.UK.2020-3.RLTS.T158021A757412.en. Accessed on 08 July 2022.
Fräßdorf, Doreen. (n.d.). Liste ausgestorbener Pflanzen der Neuzeit / List of extinct plants in modern times. Available at: https://www.artensterben.de/liste-ausgestorbener-pflanzen/ [Accessed 27 September 2026]
Margaritaria hispidula G.L.Webster
Taxonomy & Nomenclature
Conservation Status
Missing (Ralimanana, 2021)
Last record: 1962 (Ralimanana, 2021)
IUCN RedList status: Critically Endangered (Possibly Extinct)
Distribution & Habitat
Madagascar
Biology & Ecology
Hypodigm
Media
References
Original scientific description:
Webster, G. L. (1979). A revision of Margaritaria (Euphorbiaceae). Journal of the Arnold Arboretum 60(4): 403-444.
Other references:
Fräßdorf, Doreen. (n.d.). Liste ausgestorbener Pflanzen der Neuzeit / List of extinct plants in modern times. Available at: https://www.artensterben.de/liste-ausgestorbener-pflanzen/ [Accessed 27 September 2026]
Graner, Torun. (2026). A World Without Trees: An Analysis of Global Tree Extinction Rates, Geographical Distribution and Correlation to Socioeconomic Factors. Master’s Dissertation, School of Natural Sciences, Technology and Environmental Studies, Södertörn University. 41 pp.
Ralimanana, H. (2021). Margaritaria hispidula (amended version of 2019 assessment). The IUCN Red List of Threatened Species 2021: e.T128420611A194110735. https://dx.doi.org/10.2305/IUCN.UK.2021-1.RLTS.T128420611A194110735.en. Accessed on 08 July 2022.
Chrysochlamys pavonii Planch. & Triana
Taxonomy & Nomenclature
Conservation Status
Missing (Torres-Montenegro, 2021)
Last record: 1778 (Torres-Montenegro, 2021)
IUCN RedList status: Critically Endangered (Possibly Extinct)
Distribution & Habitat
Peru
Biology & Ecology
Hypodigm
Media
References
Brako, L. and Zarucchi, J. L. (1993). Catalogue of the Flowering Plants and Gymnosperms of Peru. Monograph Systematic Botany, Missouri Botanic Garden, St. Louis.
Fräßdorf, Doreen. (n.d.). Liste ausgestorbener Pflanzen der Neuzeit / List of extinct plants in modern times. Available at: https://www.artensterben.de/liste-ausgestorbener-pflanzen/ [Accessed 27 September 2026]
Graner, Torun. (2026). A World Without Trees: An Analysis of Global Tree Extinction Rates, Geographical Distribution and Correlation to Socioeconomic Factors. Master’s Dissertation, School of Natural Sciences, Technology and Environmental Studies, Södertörn University. 41 pp.
Torres-Montenegro, L. A. (2021). Chrysochlamys pavonii. The IUCN Red List of Threatened Species 2021: e.T177516426A177516454. https://dx.doi.org/10.2305/IUCN.UK.2021-1.RLTS.T177516426A177516454.es. Accessed on 08 July 2022.
Drypetes ochrodasya Airy Shaw
Taxonomy & Nomenclature
Conservation Status
Missing (Barker, 2020)
Last record: 1938 (Barker, 2020)
IUCN RedList status: Critically Endangered (Possibly Extinct)
Distribution & Habitat
Sumatra, Indonesia
Biology & Ecology
Hypodigm
Media
References
Barker, A. (2020). Drypetes ochrodasya. The IUCN Red List of Threatened Species 2020: e.T168746579A168908334. https://dx.doi.org/10.2305/IUCN.UK.2020-3.RLTS.T168746579A168908334.en. Accessed on 08 July 2022.
Fräßdorf, Doreen. (n.d.). Liste ausgestorbener Pflanzen der Neuzeit / List of extinct plants in modern times. Available at: https://www.artensterben.de/liste-ausgestorbener-pflanzen/ [Accessed 27 September 2026]
Graner, Torun. (2026). A World Without Trees: An Analysis of Global Tree Extinction Rates, Geographical Distribution and Correlation to Socioeconomic Factors. Master’s Dissertation, School of Natural Sciences, Technology and Environmental Studies, Södertörn University. 41 pp.
Trigonostemon hartleyi Airy Shaw
Taxonomy & Nomenclature
Conservation Status
Missing (Jimbo & Barstow, 2020)
Last record: 1963 (Jimbo & Barstow, 2020)
IUCN RedList status: Critically Endangered (Possibly Extinct)
Distribution & Habitat
Papua New Guinea
Biology & Ecology
Hypodigm
Media
References
Fräßdorf, Doreen. (n.d.). Liste ausgestorbener Pflanzen der Neuzeit / List of extinct plants in modern times. Available at: https://www.artensterben.de/liste-ausgestorbener-pflanzen/ [Accessed 27 September 2026]
Graner, Torun. (2026). A World Without Trees: An Analysis of Global Tree Extinction Rates, Geographical Distribution and Correlation to Socioeconomic Factors. Master’s Dissertation, School of Natural Sciences, Technology and Environmental Studies, Södertörn University. 41 pp.
Jimbo, T. and Barstow, M. (2020). Trigonostemon hartleyi. The IUCN Red List of Threatened Species 2020: e.T143385908A143765484. https://dx.doi.org/10.2305/IUCN.UK.2020-2.RLTS.T143385908A143765484.en. Accessed on 08 July 2022.
Yu, R.-Y and van Welzen, P. C. (2018). A taxonomic revision of Trigonostemon (Euphorbiaceae) in Malesia. Blumea 62(3): 179-229.