Cyperus neokunthianus Kük.



Taxonomy & Nomenclature



Conservation Status

Missing (Wood et al., 2019) or Extinct (Wagner et al., 1999; Albani Rocchetti et al., 2022); "extinct or missing" (Suckling et al., 2004)

Last record: 1920 (Wood et al., 2019); 1980 (Price et al., 2004 fide Suckling et al., 2004); 1997 (uncertain) (see Suckling et al., 2004:48/63)


"Cyperus neokunthianus was endemic to the West Maui Mountains, Maui, Hawaii. It is listed as extinct by Wagner et al. 1999 and as missing by NatureServe. The latter states that it was last seen in the early 1900s, but Price et al. 2004 state that was last seen in 1980. A USFWS database suggests it was last seen in 1997, but there is no supporting documentation. We judge 1980 to be the last reasonably certain observation date."

(Suckling et al., 2004:48/63)



West Maui Mountains, Maui, Hawaiian Islands, USA


Biology & Ecology










Albani Rocchetti, Giulia, Carta, Angelino, Mondoni, Andrea, Godefroid, Sandrine, Davis, Charles C., Caneva, Giulia, Albrecht, Matthew A., Alvarado, Karla, Bijmoer, Roxali, Borosova, Renata, Bräuchler, Christian, Breman, Elinor, Briggs, Marie, Buord, Stephane, Cave, Lynette H., Da Silva, Nílber Gonçalves, Davey, Alexandra H., Davies, Rachael M., Dickie, John B., Fabillo, Melodina, Fleischmann, Andreas, Franks, Andrew, Hall, Geoffrey, Kantvilas, Gintaras, Klak, Cornelia, Liu, Udayangani, Medina, Leopoldo, Reinhammar, Lars Gunnar, Sebola, Ramagwai J., Schönberger, Ines, Sweeney, Patrick, Voglmayr, Hermann, White, Adam, Wieringa, Jan J., Zippel, Elke Zippel and Abeli, Thomas. (2022). Selecting the best candidates for resurrecting extinct-in-the-wild plants from herbaria. Nature Plants 8: 1385-1393. [Supplementary Tables S1-S6]

Koyama, T. (1990). Cyperaceae. Pp. 1381-1436 in: Wagner, W.L., D.R. Herbst, and S.H. Sohmer, Manual of the flowering plants of Hawai`i. Special Publ. Bishop Mus., Honolulu 83: 1-1853.

Price, J., W.W. Wagner, and P.M. O'Grady. 2004. Letter to Kieran Suckling, Center for Biological Diversity, from Johnathan Price, Warren W. Wagner, and Patrick M. O'Grady, Smithsonian Institution Department of Botany, April 28, 2004.

Scanlan, G.M. 1942. A study of the genus Cyperus in the Hawaiian Islands. Catholic Univ. Amer., Biol. Ser. 41: 1- 62.

USFWS. 2003. Hawaiian Islands Plants: Listed and Candidate Species, as Designated under the U.S. Endangered Species Act (Updated 2003). United States Fish and Wildlife Service, Honolulu, HI.

U.S. Fish and Wildlife Service (USFWS). 2014. Review of Native Species That Are Candidates for Listing as Endangered or Threatened; Annual Notice of Findings on Resubmitted Petitions; Annual Description of Progress on Listing Actions. Federal Register 79(234): 72450-72497.

U.S. Fish and Wildlife Service (USFWS). 2015. Endangered Status for 49 Species From the Hawaiian Islands. Federal Register 80(189): 58820-58909.

U.S. Fish and Wildlife Service (USFWS). 2016. Endangered Status for 49 Species From the Hawaiian Islands. Final rule. Federal Register 81(190): 67786-67860.

Wagner, W.L., M.M. Bruegmann, D.R. Herbst, and J.Q.C. Lau. 1999. Hawaiian Vascular Plants at Risk:1999. Contribution No. 1999-023 to the Hawaii Biological Survey. Bishop Museum Occasional Papers: No. 60, 1999.

Wagner, W. L., and D. R. Herbst. 1999. Supplement to the Manual of the flowering plants of Hawaii. Pages 1855-1918 in W.L. Wagner, D.R. Herbst and S.H. Sohmer. Manual of the flowering plants of Hawaii. Revised edition. Univ. Hawaii Press and Bishop Museum Press, Honolulu.

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.


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