| Romanschulzia correllii Rollins, 1984 |
| Romanschulzia elata Rollins, 1942 |
| Romanschulzia guerrerensis Bustam. & R. M. Fonseca, 2009 |
| Romanschulzia mexicana Iltis & Al-Shehbaz, 1993 |
| Romanschulzia meyeri Rollins, 1956 |
| Romanschulzia orizabae (Schltdl. & Cham.) O.E. Schulz, 1933 |
| Romanschulzia resediflora (Kunth) O.E. Schulz, 1933 |
| Romanschulzia resediflora var. lasiocarpa O. E. Schulz, 1933 |
| Romanschulzia rzedowskii Rollins, 1984 |
| Romanschulzia schistacea Rollins, 1956 |
| Romanschulzia subclavata Rollins, 1956 |
| Romanschulzia turritoides (Loes.) O. E. Schulz, 1933 |
| Roripella (Maire) Greuter & Burdet, 1983 |
| Rorippa Scop., 1760 |
| Rorippa clavata Rydb., 1902 |
| Rorippa curvipes Greene, 1896 |
| Rorippa curvisiliqua (Hook.) Bessey ex Britton, 1894 |
| Rorippa dictyota Greene, 1894 |
| Rorippa gambellii (S. Watson) Rollins & Al-Shehbaz, 1988 |
| Rorippa heterophylla (Blume) R. O. Williams, 1929 |