| Veratrum caricifolium Schltdl., 1838 |
| Veratrum frigidum Schltdl. & Cham., 1831 |
| Veratrum luteum Sessé & Moc., 1890 |
| Veratrum officinale Schltdl. & Cham., 1831 |
| Veratrum tenuifolium M. Martens & Galeotti, 1842 |
| Veratrum virescens (Kunth) M. Martens & Galeotti, 1842 |
| Zigadenus Michx., 1803 |
| Zigadenus brevibracteatus (M.E. Jones) H.M. Hall, 1915 |
| Zigadenus elegans Pursh, 1814 |
| Zigadenus fremontii (Torr.) Torr., 1871 |
| Zigadenus fremontii var. brevibracteatus M.E. Jones, 1908 |
| Zigadenus frigidus (Schltdl. & Cham.) D. Don, 1832 |
| Zigadenus gracilentus Greene, 1901 |
| Zigadenus hintoniorum B.L. Turner, 1992 |
| Zigadenus mexicanus (Kunth) Hemsl., 1884 |
| Zigadenus mohinorensis Greenm., 1903 |
| Zigadenus neglectus Espejo, López-Ferr. & Ceja, 1999 |
| Zigadenus paniculatus (Nutt.) S. Watson, 1871 |
| Zigadenus porrifolius Greene, 1881 |
| Zigadenus venenosus S. Watson, 1879 |