Lobelia monostachya (Waianae Range lobelia) is a species of flowering plant in the Campanulaceae family that is endemic to the island of Oʻahu in Hawaii. It inhabits cliffside mesic shrublands in the southern Koʻolau Mountains at an elevation of 44–614 m (144–2,014 ft). It was previously believed to be extinct. In 1994 it was rediscovered and only 8 individuals are currently known to exist. Associated native plants include Artemisia australis, Carex meyenii, Eragrostis spp., and Psilotum nudum. It is threatened by habitat loss.
- Bruegmann, M.M. & Caraway, V. 2003. Lobelia monostachya. 2010 IUCN Red List of Threatened Species. Downloaded on 13 May 2011.
- "Taxon: Lobelia monostachya (Rock) Lammers". Germplasm Resources Information Network. United States Department of Agriculture. 2000-03-02. Retrieved 2011-02-26.
- "Lobelia monostachya". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 22 June 2015.
- USFWS. Lobelia monostachya Five-year Review. January 2008.
- "Lobelia monostachya" (PDF). Hawaii's Comprehensive Wildlife Conservation Strategy. Hawaii Department of Fish and Wildlife. Retrieved 2011-02-27.
- Media related to Lobelia monostachya at Wikimedia Commons
- Data related to Lobelia monostachya at Wikispecies
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