Phyllostegia knudsenii Hillebr. (1888:354)
Taxonomy & Nomenclature
Synonym/s: Phyllostegia secunda H.St.John
Conservation Status
Missing (Clark, 2015; Wood et al., 2019:11) or Extinct (Humphreys et al., 2019; Christenhusz & Govaerts, 2024)
Last record (disputed): 1994 (Christenhusz & Govaerts, 2024); 2001 (Clark, 2015; Wood et al., 2019:11)
IUCN RedList status: Critically Endangered (Possibly Extinct)
Distribution
Koaie Canyon, Kaua'i, Hawaiian Islands, USA
Biology & Ecology
Hypodigm
Media
References
Christenhusz, Maarten J. M. and Govaerts, Rafaël. (2023). Uitgestorven. Op plantenjacht rond de wereld: 1-511. Sterck & De Vreese.
Christenhusz, Maarten J. M. and Govaerts, Rafaël. (2024). Plant extinction in the Anthropocene. Botanical Journal of the Linnean Society. https://doi.org/10.1093/botlinnean/boae045 [Appendix S1]
Clark, M. (2015). Phyllostegia knudsenii. The IUCN Red List of Threatened Species 2015: e.T80174379A80174390. https://dx.doi.org/10.2305/IUCN.UK.2015-4.RLTS.T80174379A80174390.en. Downloaded on 25 November 2017.
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]
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 7 November 2024]
Wagner, Warren L. (1999). Nomenclator and review of Phyllostegia (Lamiaceae). Novon 9: 265-279.
Wagner, Warren L., Bruegmann, Marie M., Herbst, Derral M. and Lau, Joel Q. C. (1999). Hawaiian Vascular Plants at Risk: 1999. Bishop Museum Occasional Papers 60: 1-58.
Wagner, Warren L., Herbst, D. and Sohmer, S. (1990). Manual of the Flowering Plants of Hawai'I 1-2: 1-1853. University of Hawaii Press.
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. (2012). Possible Extinctions, Rediscovereies, and New Plant Records within the Hawaiian Islands. Records of the Hawaii Biological Survey for 2011. Edited by Neal L. Evenhuis & Lucius G. Eldredge. Bishop Museum Occasional Papers 113: 91-102.
Wood, Kenneth R. (2015). Survey Results for Eight Possibly Extinct Plant Species from Kaua`i, Hawai`i. Prepared for the U.S. Fish and Wildlife Service, FWS Agreement No. F12AC00737. 293 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.
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