| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Rubiaceae | Richardia brasiliensis | Tropical Richardia | Roadsides, fields, vacant lots, urban areas, disturbed areas. | Native of South America. |  |
| Rubiaceae | Richardia grandiflora | Largeflower Richardia | Yards, 'improved' pastures, disturbed areas. | Native of South America (mainly Brazil). Near the northern edge of its current documented distribution, it was reported for Alachua County (Kunzer et al. 2009), "rapidly spreading". | |
| Rubiaceae | Richardia humistrata | Disturbed areas, pine savannas, pine flatwoods. | Native of South America. Also collected in 1886 as a ballast waif in Camden County, NJ; first noted on the Gulf Coast only in 1941, but perhaps early introduced there on ballast as well, such as at Pensacola. |  | |
| Rubiaceae | Richardia scabra | Rough Mexican-clover | Roadsides, fields, vacant lots, urban areas, disturbed areas. | Native of South America. Lewis & Oliver (1974) consider this species to be native from our area south through Central America into northern South America, based on the semi-contiguous distribution, but occurrences in our region seem to be in altered habitats. |  |
| Rubiaceae | Richardia tricocca | Prairie Richardia | Brushy areas and woodlands. | E., c., and s. TX south to s. Mexico. |
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