''Tridax'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

of flowering plants in the family

Asteraceae Asteraceae () is a large family (biology), family of flowering plants that consists of over 32,000 known species in over 1,900 genera within the Order (biology), order Asterales. The number of species in Asteraceae is rivaled only by the Orchi ...

.Tropicos, ''Tridax'' L.
/ref> ''Tridax'' is native primarily to the tropical regions of

North North is one of the four compass points or cardinal directions. It is the opposite of south and is perpendicular to east and west. ''North'' is a noun, adjective, or adverb indicating Direction (geometry), direction or geography. Etymology T ...

and

South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a considerably smaller portion in the Northern Hemisphere. It can also be described as the southern Subregion#Americas, subregion o ...

. ''

Tridax procumbens ''Tridax procumbens'', commonly known as coatbuttons or tridax daisy, is a species of flowering plant in the family Asteraceae. It is best known as a widespread noxious weed, weed and pest plant. It is native to the tropical Americas including M ...

'' has become naturalized in the southern United States and is considered a noxious weed in some places. ; SpeciesFlann, C (ed) 2009+ Global Compositae Checklist
/ref> ; formerly included see '' Calea

Layia ''Layia'' is a genus of flowering plants in the family Asteraceae known generally as tidy tips, native to western North America. Several are California Endemism, endemics. These are erect daisylike annual herbs with dark glandular stems. The He ...

Sabazia'' * ''Tridax accedens -

Calea verticillata CALEA may refer to: * Communications Assistance for Law Enforcement Act, an act by the US Congress to facilitate wiretapping of U.S. domestic telephone and Internet traffic *Commission on Accreditation for Law Enforcement Agencies, a private accredi ...

'' * ''Tridax ehrenbergii - Sabazia sarmentosa'' * ''Tridax gaillardioides - Layia gaillardioides'' * ''Tridax verticillata -

References

Millerieae Asteraceae genera Taxa named by Carl Linnaeus {{Millerieae-stub