Hyptis capitata, also known as false ironwort or knobweed, is a species of erect annual shrubs, of the plant family Lamiaceae. It is native to Florida, Mexico, Central America, the West Indies, and South America but naturalized in Australia, Southeast Asia, and some tropical islands. The plants grow up to a height of 1.5 meters. Crushed leaves are applied to cuts. It is considered a weed in many places.
- Kew World Checklist of Selected Plant Families
- "Hyptis capitata". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 15 May 2015.
- Hyland, B. P. M.; Whiffin, T.; Zich, F. A.; et al. (Dec 2010). "Factsheet – Hyptis capitata". Australian Tropical Rainforest Plants. Edition 6.1, online version [RFK 6.1]. Cairns, Australia: Commonwealth Scientific and Industrial Research Organisation (CSIRO), through its Division of Plant Industry; the Centre for Australian National Biodiversity Research; the Australian Tropical Herbarium, James Cook University. Retrieved 14 May 2013.
- "Botonesan. Hyptis capitata Jacq." Philippine Medicinal Plants. Philippines: StuartXchange, non-profit site supported by the Art Guild for Education and Communication Foundation Inc. & the Pulang Lupa Foundation Inc. April 2012. Retrieved 14 May 2013.
- Jackes, Betsy (11 Jan 2012). "Hyptis capitata* (Knobweed)". Discover Nature at JCU. NQ Weeds by scientific name. Australia: James Cook University. Archived from the original (webpage) on 10 April 2013. Retrieved 14 May 2013.
- "Hyptis capitata". Plants of Guam. University of Guam, College of Agriculture and Life Sciences. Archived from the original on 4 May 2012. Retrieved 14 May 2013.
- "Hyptis capitata (PIER species info)". Pacific Island Ecosystems at Risk (PIER). US Forest Service. 11 Feb 2010 [1 Jan 1999]. Retrieved 14 May 2013.
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