| Mentzelia nitens Greene, 1891 |
| Mentzelia obscura H.J. Thomps. & J.E. Roberts, 1971 |
| Mentzelia oreophila J. Darl., 1934 |
| Mentzelia orizabae Urb. & Gilg, 1900 |
| Mentzelia pachyrhiza I.M. Johnst., 1940 |
| Mentzelia palmeriana Urb. & Gilg, 1900 |
| Mentzelia pedicellata C. Presl, 1851 |
| Mentzelia polyantha Urb. & Gilg, 1894 |
| Mentzelia procera (Wooton & Standl.) J.J. Schenk & L. Hufford, 2011 |
| Mentzelia puberula J. Darl., 1934 |
| Mentzelia pumila Torr. & A. Gray, 1840 |
| Mentzelia pumila var. procera (Wooton & Standl.) J. Darl., 1934 |
| Mentzelia pumila var. pumila Torr. & A. Gray, 1840 |
| Mentzelia reverchonii (Urb. & Gilg) H.J. Thomps. & Zavort., 1968 |
| Mentzelia saxicola H.J. Thomps. & Zavort., 1968 |
| Mentzelia sessilifolia Urb. & Gilg, 1900 |
| Mentzelia sinuata (Rydb.) R.J. Hill, 1976 |
| Mentzelia stipitata Sessé & Moc. ex DC., 1828 |
| Mentzelia texana Urb. & Gilg, 1900 |
| Mentzelia veatchiana Kellogg, 1863 |