Richardia (Mexican-clover) is a genus of about fifteen species of flowering plants in the family Rubiaceae. They are native to tropical to warm, temperate regions of the Americas, with one species also native to Fiji. They are mostly annual plants, though a few species are herbaceous perennial plants.

Richardia
Richardia brasiliensis
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Gentianales
Family:	Rubiaceae
Tribe:	Spermacoceae
Genus:	Richardia Carl Linnaeus
Type species
Richardia scabra Carl Linnaeus
Species
About 15 species; see text

Selected species

• Richardia brasiliensis. Guyana and Brazil south to northern Argentina.
• Richardia grandiflora. Brazil.
• Richardia scabra. Southeastern United States south to Peru.
• Richardia tricocco. Southern Louisiana and Texas south to central Mexico.

Richardia Kunth non L. is a synonym of the genus Zantedeschia in the family Araceae.