| Caulanthus heterophyllus (Nutt.) Payson, 1923 |
| Caulanthus lasiophyllus (Hook. & Arn.) Payson, 1922 |
| Caulanthus simulans Payson, 1923 |
| Caulanthus stenocarpus Payson, 1923 |
| Caulostramina Rollins, 1973 |
| Ceriosperma (O.E. Schulz) Greuter & Burdet, 1983 |
| Chaunanthus O.E. Schulz, 1924 |
| Chaunanthus acuminatus (Rollins) R.A. Price & Al-Shehbaz, 2001 |
| Chaunanthus gracielae M. Martínez & L. Hern., 2007 |
| Chaunanthus mexicanus (Rollins) R.A. Price & Al-Shehbaz, 2001 |
| Chaunanthus petiolatus (Hemsl.) O.E. Schulz, 1924 |
| Chaunanthus torulosus Al-Shehbaz, 2013 |
| Cheiranthus L., 1753 |
| Cheiranthus alpestris (Cockerell) A. Heller, 1906 |
| Cheiranthus argillosus Greene, 1896 |
| Cheiranthus aridus A. Nelson, 1899 |
| Cheiranthus arkansanus (Nutt. ex Torr. & A. Gray) Greene, 1896 |
| Cheiranthus asperrimus Greene, 1896 |
| Cheiranthus bakeri Greene, 1901 |
| Cheiranthus californicus (Greene) Greene, 1896 |