| Cistanthe monandra (Nutt.) Hershk., 1990 |
| Cistanthe parryi (A. Gray) Hershk., 1990 |
| Cistanthe umbellata (Torr.) Hershk., 1990 |
| Cistanthe umbellata var. umbellata (Torr.) Hershk., 1990 |
| Claytonia L., 1753 |
| Claytonia cubensis Bonpl., 1806 |
| Claytonia fontana (L.) R.J. Davis, 1951 |
| Claytonia megarhiza (Hemsl.) Kuntze, 1891 |
| Claytonia napiformis (DC.) Kuntze, 1891 |
| Claytonia paniculata (DC.) Kuntze, 1891 |
| Claytonia parviflora Douglas ex Hook., 1832 |
| Claytonia patens (L.) Kuntze, 1891 |
| Claytonia perfoliata Donn ex Willd., 1798 |
| Claytonia perfoliata subsp. mexicana (Rydb.) J.M. Mill. & K.L. Chambers, 1993 |
| Claytonia reflexa (Cav.) Kuntze, 1891 |
| Claytonia sarmentosa (Engelm.) Kuntze, 1891 |
| Claytonia triangularis (Jacq.) Kuntze, 1891 |
| Claytonia tuberosa Pall. ex Schult., 1819 |
| Lewisia Pursh, 1814 |
| Lewisia brachycalyx Engelm. ex A. Gray, 1868 |