Euphorbia remyi hanaleiensis Sherff (1936:588)
Remy's broomspurge
Taxonomy & Nomenclature
Synonym/s: Chamaesyce remyi var. hanaleiensis (Sherff) O.Deg. & I.Deg. in Fl. Hawaiiensis 190: [s.p.] (1959)
Considered a synonym of monotypic E. remyi by (POWO, 2024).
Conservation Status
Last record: 1864-1865 (collection) (Wood & Walsh, 2022); 1936 (Wood et al., 2019:8); 1972 (collection) (NatureServe, 2024)
Since rediscovered (discovery of population: 23 April 2014; only later confirmed (see Wood & Walsh, 2022))
IUCN RedList status: Extinct
Distribution
Kauaʻi, Hawaiian Islands, USA
Biology & Ecology
Hypodigm
Media
References
Bruegmann, M. and Clark, M. (2016). Euphorbia remyi var. hanaleiensis. The IUCN Red List of Threatened Species 2016: e.T44127A97882651. https://dx.doi.org/10.2305/IUCN.UK.2016-2.RLTS.T44127A97882651.en. Downloaded on 17 November 2016.
Govaerts, R., Frodin, D. G. and Radcliffe-Smith, A. (2000). World Checklist and Bibliography of Euphorbiaceae (and Pandaceae) 1-4: 1-1622. The Board of Trustees of the Royal Botanic Gardens, Kew.
Kartesz, J. T. (1994). A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
NatureServe. (2024). NatureServe Network Biodiversity Location Data accessed through NatureServe Explorer [web application]. NatureServe, Arlington, Virginia. Available at: https://explorer.natureserve.org/ [Accessed 30 August 2024]
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 30 August 2024]
U.S. Fish and Wildlife Service. (2003). Rare plant database. Unpublished.
Wagner, Warren L., Bruegmann, Marie M., Herbst, Derral M. and Lau, Joel Q. C. (1999a). Hawaiian Vascular Plants at Risk: 1999. Bishop Museum Occasional Papers 60: 1-58.
Wagner, W., Herbst, D. and Sohmer, S. (1999b). Manual of the Flowering Plants of Hawaii. Bernice Pauahi Bishop Museum Special Publication 91: 1-1918.
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.
Wood, Kenneth R., Oppenheimer, Hank and Keir, Matthew. (2019). A checklist of endemic Hawaiian vascular plant taxa that are considered possibly extinct in the wild. National Tropical Botanical Garden, Technical Report #314.
Wood, Kenneth R. and Walsh, Seana K. (2022). Notes on the Hawaiian Flora: Kaua‘i Rediscoveries and Range Extensions. Records of the Hawaii Biological Survey for 2021. Edited by Neal L. Evenhuis, N.L. Bishop Museum Occasional Papers 142: 27-34.
http://www.pepphi.org/uploads/2/5/4/7/25478598/pep_list_20180410.pdf
http://www.pepphi.org/uploads/2/5/4/7/25478598/pep_list_20150420.pdf
https://vanishingflora.proboards.com/thread/105/chamaesyce-remyi-var-hanaleiensis
Euphorbia pirahazo Jum.
Taxonomy & Nomenclature
Conservation Status
Missing
IUCN RedList status: Critically Endangered (Possibly Extinct)
Distribution
Madagascar (western)
Biology & Ecology
Hypodigm
Media
References
Denis, M. 1921. Les Euphorbiées des Iles Australes d'Afrique. Theses. Nemours.
Haevermans, T. 2004. Euphorbia pirahazo. The IUCN Red List of Threatened Species 2004: e.T44423A10901671. http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T44423A10901671.en. Downloaded on 27 December 2015.
Euphorbia neospinescens Bruyns
Taxonomy & Nomenclature
Synonym/s: Monadenium spinescens (Pax) P.R.O.Bally; Stenadenium spinescens Pax
Conservation Status
Missing
Last record: 1942
IUCN RedList status: Critically Endangered (Possibly Extinct)
Distribution
Chunya District, Tanzania
Biology & Ecology
Hypodigm
Media
References
Carter, S. and Radcliffe-Smith, A. (1988). Euphorbiaceae, Part II. In: R.M. Polhill (ed.) Flora of Tropical East Africa. Royal Botanic Gardens, Kew.
IUCN SSC East African Plants Red List Authority. (2013). Euphorbia neospinescens. The IUCN Red List of Threatened Species 2013: e.T47348627A47348634. http://dx.doi.org/10.2305/IUCN.UK.2013-2.RLTS.T47348627A47348634.en. Downloaded on 27 December 2015.
Euphorbia dressleri V. W. Steinm. 2003:48
Taxonomy & Nomenclature
Synonym/s: Pedilanthus gracilis Dressler, 1957:109
Conservation Status
Missing
Distribution
Mexico
Biology & Ecology
Hypodigm
Media
References
Original scientific description:
Steinmann, Victor W. (2003). The submersion of Pedilanthus into Euphorbia (Euphorbiaceae). Acta Botanica Mexicana 65: 45-50.
Other references:
Dressler. (1957). [description of Pedilanthus gracilis]. Contr. Gray Herb. 182: 109.
Olson, Mark E., Lomelí S, José A. and Cacho, N. Ivalú. (2005). Extinction threat in the Pedilanthus clade (Euphorbia, Euphorbiaceae), with special reference to the recently rediscovered E. conzattii (P. pulchellus). American Journal of Botany 92(4): 634-641.
Euphorbia daphnoides Baill., nom. illeg.
Taxonomy & Nomenclature
Now considered a synonym of Euphorbia hexadenia (source) or E. pyrifolia (Humphreys et al., 2019)
Conservation Status
Invalid (synonym)
Was listed as Extinct by (WCMC, 1992:218).
Distribution & Habitat
Rodrigues, Mascarene Islands
Biology & Ecology
Hypodigm
Media
References
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]
POWO. 2018. Plants of the World online. Facilitated by the Royal Botanic Gardens, Kew. http://e-monocot.org/.
Strahm, W. (1989). Plant red data book for Rodrigues: 1-241. Knigstein.
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://vanishingflora.proboards.com/thread/3061/euphorbia-daphnoides