Phyllostegia imminuta (Sherff) H.St.John (1987:175)
Taxonomy & Nomenclature
Synonym/s: Phyllostegia helleri var. imminuta Sherff in Amer. J. Bot. 21: 699 (1934); Phyllostegia immunuta Sherff [orth. error used by WCMC, 1992:219]
Now considered a synonym of P. haliakalae by (Wagner, 1999; Humphreys et al., 2019; POWO, 2026).
Conservation Status
Invalid (synonym of P. haliakalae) (Wagner, 1999; Humphreys et al., 2019; POWO, 2026)
Last record: 1920 (USFWS, 2001); 1979 (Suckling et al. 2004)
Was listed as Extinct by (WCMC, 1992:219), and has been listed as GH (Possibly Extinct) by NatureServe since 2012 (NatureServe, 2026).
Distribution & Habitat
Lanai, Maui (eastern) & Molokai, Hawaiian Islands, USA
Biology & Ecology
Hypodigm
Media
References
Original scientific description:
Sherff, E. E. (1934). Some new or otherwise important Labiatae of the Hawaiian Islands. Amer. J. Bot. 21: 698- 701.
Other references:
CPC. (1992). Centre for plant conservation data for North American plants database. CPC, Centre for plant conservation.
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]
NatureServe. (2026). Phyllostegia imminuta: Lanai Phyllostegia. NatureServe Network Biodiversity Location Data accessed through NatureServe Explorer [web application]. NatureServe, Arlington, Virginia. Available at: https://explorer.natureserve.org/ [Accessed on 20 August 2026]
POWO. (2018). Plants of the World online. Facilitated by the Royal Botanic Gardens, Kew. http://e-monocot.org/.
POWO. (2026). Plants of the World Online (online resource). Facilitated by the Royal Botanic Gardens, Kew, United Kingdom. Available at: https://powo.science.kew.org/ [Accessed 19 August 2026]
Sherff, E. E. (1935). Revision of Haplostachys, Phyllostegia, and Stenogyne. Bernice P. Bishop Mus. Bull. 136: 1-101.
Suckling, Kieran, Slack, Rhiwena and Nowicki, Brian. (2004). Extinct and the Endangered Species Act. Centre For Biological Diversity. 63 pp.
USFWS (U. S. Fish and Wildlife Service). (2001). Endangered and threatened wildlife and plants: Review of plant and animal species that are candidates or proposed for listing as endangered or threatened, annual notice of findings on recycled petitions, and annual description of progress on listing actions; proposed rule. Federal Register 66: 54808-54832.
Wagner, W. L. (1999). Nomenclator and review of Phyllostegia (Lamiaceae). Novon 9: 265-279.
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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