| Ramirezella lozanii (Rose) Piper, 1926 |
| Ramirezella micrantha Delgado & Ochot.-Booth, 1994 |
| Ramirezella nitida Piper, 1926 |
| Ramirezella occidentalis Rose, 1903 |
| Ramirezella penduliflora Delgado & Ochot.-Booth, 1994 |
| Ramirezella pubescens Rose, 1903 |
| Ramirezella strobilophora (B.L. Rob.) Rose, 1903 |
| Ramirezella strobilophora var. buseri (Micheli) Maréchal, Mascherpa & Stainier, 1978 |
| Ramirezella strobilophora var. pubescens (Rose) Maréchal, Mascherpa & Stainier, 1978 |
| Rhadinocarpus Vogel, 1838 |
| Rhadinocarpus brasiliensis Vogel, 1838 |
| Rhynchosia Lour., 1790 |
| Rhynchosia amabilis Grear, 1978 |
| Rhynchosia americana (Mill.) Metz, 1934 |
| Rhynchosia angustifolia Engelm. ex A. Gray, 1852 |
| Rhynchosia apoloensis (Rusby) J.F. Macbr., 1925 |
| Rhynchosia aureo-guttata Andersson, 1853 |
| Rhynchosia australis Rose, 1903 |
| Rhynchosia bicolor Micheli, 1903 |
| Rhynchosia caribaea Chapm., 1860 |