''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 The Americas, which are sometimes collectively called America, are a landmass comprising the totality of North and South America. The Americas make up most of the land in Earth's Western Hemisphere and comprise the New World. Along with th ...

, with one species also native to

Fiji Fiji ( , ,; fj, Viti, ; Fiji Hindi: फ़िजी, ''Fijī''), officially the Republic of Fiji, is an island country in Melanesia, part of Oceania in the South Pacific Ocean. It lies about north-northeast of New Zealand. Fiji consists ...

. They are mostly

annual plant An annual plant is a plant that completes its life cycle, from germination to the production of seeds, within one growing season, and then dies. The length of growing seasons and period in which they take place vary according to geographical ...

s, though a few species are

herbaceous Herbaceous plants are vascular plants that have no persistent woody stems above ground. This broad category of plants includes many perennials, and nearly all annuals and biennials. Definitions of "herb" and "herbaceous" The fourth edition of t ...

perennial plants. ;Selected species *''

Richardia brasiliensis ''Richardia brasiliensis'' is a species of flowering plant in the coffee family known by the English common names tropical Mexican clover,Guyana Guyana ( or ), officially the Cooperative Republic of Guyana, is a country on the northern mainland of South America. Guyana is an indigenous word which means "Land of Many Waters". The capital city is Georgetown. Guyana is bordered by the ...

and Brazil south to northern Argentina. *''

Richardia grandiflora ''Richardia grandiflora'', the largeflower Mexican clover, largeflower pusley, or Florida snow, is a species of flowering plant native to Brazil, Bolivia, Paraguay, Uruguay, and northeastern Argentina. It is in the Rubiaceae family. Used as a gro ...

''. Brazil. *''

Richardia scabra ''Richardia scabra'', commonly called rough Mexican clover or Florida pusley, is a species of flowering plant in the family Rubiaceae. It is widespread, native to warm areas of both North America and South America. In the southeastern United Stat ...

''. Southeastern United States south to Peru. *''

Richardia tricocco ''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 p ...

''. Southern Louisiana and Texas south to central Mexico. ---- ''Richardia'' Kunth non L. is a

synonym A synonym is a word, morpheme, or phrase that means exactly or nearly the same as another word, morpheme, or phrase in a given language. For example, in the English language, the words ''begin'', ''start'', ''commence'', and ''initiate'' are all ...

of the genus '' Zantedeschia'' in the family Araceae.

References

Germplasm Resources Information Network: ''Richardia''
Rubiaceae genera Spermacoceae {{Rubioideae-stub