Pausinystalia brachythyrsum (K.Schum.) W.Brandt (1922:66)

Taxonomy & Nomenclature

Synonym/s: Corynanthe brachythyrsus K.Schum. in Notizbl. Bot. Gart. Berlin-Dahlem 3: 95 (1901); Pausinystalia macroceras f. brachythyrsum (K.Schum.) N.Hallé in Fl. Gabon 12: 71 (1966)

This taxon is possibly a junior synonym of Corynanthe macroceras (Murphy et al., 2023:16; POWO, 2024).

Conservation Status

Missing (Onana et al., 2011:280) or Extinct (WCMC, 1998) if valid (Murphy et al., 2023:16; POWO, 2024)

Last record (disputed): 1746 (WCMC, 1998); 1898 (Schumann, 1901; Murphy et al., 2023:16)

IUCN RedList status: Extinct

Erroenously listed as Rediscovered by (Humphreys et al., 2019), as the source they cite (viz. Onana et al., 2011) does not in fact report the taxon's rediscovery.

Distribution & Habitat

Bipinde, western Cameroon

Biology & Ecology

Hypodigm

Media

References

Baillie, Jonathan E. M. and Butcher, Ellen R. (2012). Priceless or Worthless? The world’s most threatened species. London, UK: Zoological Society of London.

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]

Govaerts, R. (2003). World Checklist of Selected Plant Families Database in ACCESS: 1-216203. The Board of Trustees of the Royal Botanic Gardens, Kew.

Humphreys, Aelys M., Govaerts, Rafaël, Ficinski, Sarah Z., Lughadha, Eimear Nic and Vorontsova, Maria S. (2019). Global dataset shows geography and life form predict modern plant extinction and rediscovery. Nature Ecology & Evolution 3: 1043-1047. https://doi.org/10.1038/s41559-019-0906-2 [Supplementary Dataset 1]

Murphy, Bruce, Onana, Jean Michel, Burgt, Xander M. van der, Ngansop Tchatchouang, Eric, Williams, Jenny, Tchiengué, Barthélemy and Cheek, Martin. (2023). Important Plant Areas of Cameroon. Royal Botanic Gardens, Kew. 302 pp. [automatic download]

Oldfield, Sara, Lusty, Charlotte and MacKinven, Amy (compilers). (1998). The World List of Threatened Trees. Cambridge, U.K.: World Conservation Press. 650 pp.

Onana, Jean Michel, Cheek, Martin and Pollard, Benedict John. (2011). Red Data Book of the Flowering Plants of Cameroon. Kew: Royal Botanic Gardens. 578 pp.

POWO. (2024). Plants of the World Online (online resource). Facilitated by the Royal Botanic Gardens, Kew, United Kingdom. Available at: https://powo.science.kew.org/ [Accessed 18 June 2024]

Schumann, Karl Moritz. (1901). Notizblatt des Botanischen Gartens und Museums zu Berlin-Dahlem 3: 95-96.

Stoffelen, P., Robbrecht, E. and Smets, E. (1996). A revision of Corynanthe and Pausinystalia (African Rubiaceae-Coptosapelteae). Botanical Journal of the Linnean Society 120(4): 287-325.

World Conservation Monitoring Centre. (1998). Pausinystalia brachythyrsum. The IUCN Red List of Threatened Species 1998: e.T36157A9978900. http://dx.doi.org/10.2305/IUCN.UK.1998.RLTS.T36157A9978900.en. Downloaded on 17 September 2016.

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Pachycarpus rostratus N.E.Br.

Taxonomy & Nomenclature

Conservation Status

Missing

Distribution

Nkandla district, KwaZulu-Natal, South Africa

Biology & Ecology

Hypodigm

Media

References

Hilton-Taylor, C. 1996. Red data list of southern African plants. Strelitzia 4. South African National Botanical Institute, Pretoria.

Le Roux, Johannes J., Hui, C., Castillo, M. L., Iriondo, J. M., Keet, J.-H., Khapugin, A. A., Médail, F., Rejmánek, M., Theron, G. Yannelli, F. A. and Hirsch, H. (2019). Recent Anthropogenic Plant Extinctions Differ in Biodiversity Hotspots and Coldspots. Current Biology 29(17): 2912-2918.e2. https://doi.org/10.1016/j.cub.2019.07.063

Nicholas, A. 1999. A taxonomic reassessment of the subtribe Asclepiadinae (Asclepiaceae) in Southern Africa. Unpublished Ph.D., University of Durban-Westville, Durban.

Nicholas, A. & von Staden, L. 2015. Pachycarpus rostratus N.E.Br. National Assessment: Red List of South African Plants version 2017.1. Accessed on 2017/06/08.

Raimondo, D., von Staden, L., Foden, W., Victor, J.E., Helme, N.A., Turner, R.C., Kamundi, D.A. and Manyama, P.A. 2009. Red List of South African Plants. Strelitzia 25. South African National Biodiversity Institute, Pretoria.

Scott-Shaw, C.R. 1999. Rare and threatened plants of KwaZulu-Natal and neighbouring regions. KwaZulu-Natal Nature Conservation Service, Pietermaritzburg.

Smith, D.M.N. 1988. A revision of the genus Pachycarpus in southern Africa. South African Journal of Botany 54(5):399-439.

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Opercularia acolytantha Diels (1905:547)

Esperance dog weed

Taxonomy & Nomenclature

Conservation Status

Last (and only) record: 1901 (Silcock et al., 2019:SM:19 [sole record; plus date]; Christenhusz & Govaerts, 2025 [date only])

Rediscovered in: 1968 (Silcock et al., 2019:SM:19)

Was listed as Extinct by (WCMC, 1992:221). Still listed as Extinct by (Humphreys et al., 2019; Christenhusz & Govaerts, 2025)

Distribution & Habitat

near Esperance, Western Australia, Australia

Biology & Ecology

Hypodigm

Media

References

Original scientific description:

Diels, F. L. E. & E. Pritzel (1904). Fragmenta Phytographiae Australiae occidentalis: Beitrage zur Kenntnis der Pflanzen Westaustraliens, ihrer Verbreitung und ihrer Lebensverhaltnisse. Botanische Jahrbucher fur Systematik. 35: ??-??.

Other references:

Brown, A., C. Thomson-Dans & N. Marchant, eds. (1998). Western Australia's Threatened Flora. Como, Western Australia: Department of Conservation and Land Management.

Department of the Environment. (2015). Opercularia acolytantha in Species Profile and Threats Database, Department of the Environment, Canberra. Available from: http://www.environment.gov.au/sprat. Accessed Sat, 7 Feb 2015 13:38:43 +1100.

Govaerts, R. (2003). World Checklist of Selected Plant Families Database in ACCESS: 1-216203. The Board of Trustees of the Royal Botanic Gardens, Kew.

Hearn, Roger W., Meissner, Rachel, Brown, Andrew P., Macfarlane, Terry D. and Annels, Tony R. (2006). Declared Rare and Poorly Known Flora in the Warren Region. Western Australian Wildlife Management Program No. 40. Jointly published by Australian Government Department of Environment and Heritage (Canberra) & Western Australian Department of Conservation and Land Management (Bentley DC). x + 305 pp.

Hnatiuk, R. J. (1990). Census of Australian vascular plants. Australian Flora and Fauna Series 11: 1-650.

Humphreys, Aelys M., Govaerts, Rafaël, Ficinski, Sarah Z., Lughadha, Eimear Nic and Vorontsova, Maria S. (2019). Global dataset shows geography and life form predict modern plant extinction and rediscovery. Nature Ecology & Evolution 3: 1043-1047. https://doi.org/10.1038/s41559-019-0906-2 [Supplementary Dataset 1]

Markey, A. S. (2018). By their fruit you will recognise them: species notes and typifications in Western Australian species of Opercularia (Rubiaceae: Anthosperminae). Nuytsia 29: 119-140. https://doi.org/10.58828/nuy00866

Silcock, Jen L., Field, Ashley R., Walsh, Neville G. and Fensham, Roderick J. (2019). To name those lost: assessing extinction likelihood in the Australian vascular flora. Oryx 54(2): 167-177. https://doi.org/10.1017/S0030605318001357 [Supplementary Material]

Walter, Kerry S. and Gillett, Harriet J. (eds.). (1998). 1997 IUCN Red List of Threatened Plants. Compiled by the World Conservation Monitoring Centre. Gland, Switzerland & Cambridge, UK: IUCN – The World Conservation Union. lxiv + 862 pp.

WCMC (World Conservation Monitoring Centre). (1992). Global Biodiversity: Status of the Earth's living resources. London: Chapman & Hall. xx + 594 pp.

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Oldenlandia sieberi sieberi Baker

Taxonomy & Nomenclature

Conservation Status

Extinct (WCMC, 1992:221) or Rediscovered

Distribution & Habitat

Mauritius, Mascarene Islands

Biology & Ecology

Hypodigm

Media

References

Bosser, J. & al. (eds.) (1976-). Flore des Mascareignes. IRD Éditions, MSIRI, RBG-Kew, Paris.

Humphreys, Aelys M., Govaerts, Rafaël, Ficinski, Sarah Z., Lughadha, Eimear Nic and Vorontsova, Maria S. (2019). Global dataset shows geography and life form predict modern plant extinction and rediscovery. Nature Ecology & Evolution 3: 1043-1047. https://doi.org/10.1038/s41559-019-0906-2 [Supplementary Dataset 1]

Walter, Kerry S. and Gillett, Harriet J. (eds.). (1998). 1997 IUCN Red List of Threatened Plants. Compiled by the World Conservation Monitoring Centre. Gland, Switzerland & Cambridge, UK: IUCN – The World Conservation Union. lxiv + 862 pp.

WCMC (World Conservation Monitoring Centre). (1992). Global Biodiversity: Status of the Earth's living resources. London: Chapman & Hall. xx + 594 pp.

http://www.lemauricien.org/weekend/070902/mg.htm

http://vanishingflora.proboards.com/thread/1977/oldenlandia-sieberi-var

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