| Rhynchosia rosaurae Rzed., 2017 |
| Rhynchosia rupicola Brandegee, 1905 |
| Rhynchosia senna Gillies ex Hook., 1833 |
| Rhynchosia senna f. lanceolatis Ball, 1884 |
| Rhynchosia senna var. angustifolia (A. Gray) Grear, 1978 |
| Rhynchosia senna var. cordobensis (Griseb.) Burkart, 1967 |
| Rhynchosia senna var. texana (Torr. & A. Gray) M.C. Johnst., 1984 |
| Rhynchosia sessiliflora (Poir.) DC., 1825 |
| Rhynchosia sousae Fortunato, 2014 |
| Rhynchosia swartzii (Vail) Urb., 1918 |
| Rhynchosia tamaulipensis Grear, 1978 |
| Rhynchosia tarphantha Standl., 1929 |
| Rhynchosia texana Torr. & A. Gray, 1840 |
| Rhynchosia texana f. cordobensis Griseb., 1874 |
| Rhynchosia texana var. angustifolia A. Gray, 1852 |
| Rhynchosia texana var. microphylla Hassl., 1919 |
| Rhynchosia volubilis Lour., 1790 |
| Rhynchosia yucatanensis Grear, 1978 |
| Ricoa Duno & Torke, 2022 |
| Ricoa leptophylla (DC.) Duno & Torke, 2022 |