| Anticlea Kunth, 1843 |
| Anticlea fremontii Torr., 1857 |
| Anticlea frigida (Schltdl. & Cham.) Zomlefer & Judd, 2002 |
| Anticlea gracilenta (Greene) R.R. Gates, 1918 |
| Anticlea hintoniorum (B.L. Turner) Zomlefer & Judd, 2002 |
| Anticlea mexicana Kunth, 1843 |
| Anticlea mohinorensis (Greenm.) R.R. Gates, 1918 |
| Anticlea neglecta (Espejo, López-Ferr. & Ceja) Zomlefer & Judd, 2002 |
| Anticlea porrifolia (Greene) Rydb., 1903 |
| Anticlea virescens (Kunth) Rydb., 1903 |
| Anticlea volcanica (Benth.) Baker, 1880 |
| Helionadeae Fries |
| Helonias L., 1753 |
| Helonias officinalis (Schltdl. & Cham.) D. Don, 1832 |
| Helonias virescens Kunth, 1815 |
| Melanthiaceae Batsch ex Borkh., 1797 |
| Melanthieae Griseb., 1846 |
| Schoenocaulon A. Gray, 1837 |
| Schoenocaulon calcicola Greenm., 1907 |
| Schoenocaulon caricifolium (Schltdl.) A. Gray, 1907 |