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Alternanthera
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{{Short description|Genus of flowering plants}} {{Automatic taxobox |image = Starr 030523-0122 Alternanthera pungens.jpg |image_caption = ''[[Alternanthera caracasana]]'' (khakiweed) |image2 = KALIKO-Alternanthera bettzickiana (14).jpg |image2_caption = ''[[Alternanthera bettzickiana]]'' (calicoplant) |taxon = Alternanthera |authority = [[Peter Forsskål|Forssk.]] (1775) |subdivision_ranks = Species |subdivision = 80-200, see text |synonyms = *''Adoceton'' {{small|Raf. (1817)}} *''Adoketon'' {{small|Raf. (1817)}} *''Allaganthera'' {{small|Mart. (1814)}} *''Amarantesia'' {{small|Regel (1869)}} *''Brandesia'' {{small|Mart. (1826)}} *''Bucholzia'' {{small|Mart. (1826)}} *''Everion'' {{small|Raf. (1838)}} *''Jeilium'' {{small|Regel (1869)}} *''Mogiphanes'' {{small|Mart. (1826)}} *''Pityranthus'' {{small|Mart. (1817)}} *''Steiremis'' {{small|Raf. (1837)}} *''Telanthera'' {{small|R.Br. (1818)}} |synonyms_ref = <ref name = powo>[https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:327196-2 ''Alternanthera'' Forssk.] ''[[Plants of the World Online]]''. Retrieved 3 April 2024.</ref> }} '''''Alternanthera''''' is a [[genus]] of flowering plants in the family [[Amaranthaceae]]. It is a widespread genus with most species occurring in the [[tropics|tropical]] Americas,<ref name=san>Sánchez-Del Pino, I., et al. (2012). [http://onlinelibrary.wiley.com/doi/10.1111/j.1095-8339.2012.01248.x/abstract?deniedAccessCustomisedMessage=&userIsAuthenticated=false Molecular phylogenetics of ''Alternanthera'' (Gomphrenoideae, Amaranthaceae): resolving a complex taxonomic history caused by different interpretations of morphological characters in a lineage with C<sub>4</sub> and C<sub>3</sub>–C<sub>4</sub> intermediate species.] ''Botanical Journal of the Linnean Society'' 169(3), 493-517.</ref><ref name=fna>[http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=101216 ''Alternanthera''.] Flora of North America.</ref> and others in Asia, Africa, and Australia.<ref name=fna/> Plants of the genus may be known generally as '''joyweeds''', or '''Joseph's coat'''.<ref name=itis>[https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=20763 ''Alternanthera''.] Integrated Taxonomic Information System (ITIS).</ref> Several species are notorious [[noxious weed]]s.<ref name=tan>Tanveer, A., et al. (2013). [http://www.wssp.org.pk/5-19-1-53-58.pdf A review on genus ''Alternanthera'' weeds implications.] {{Webarchive|url=https://web.archive.org/web/20131023131007/http://www.wssp.org.pk/5-19-1-53-58.pdf |date=2013-10-23 }} ''Pak. J. Weed Sci. Res'' 19(1), 53-58.</ref>
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