| Ferula caruifolia Hook. & Arn. | Lomatium caruifolium (Hook. & Arn.) J.M.Coult. & Rose |
| Ferula foeniculacea Nutt. | Lomatium foeniculaceum (Nutt.) J.M.Coult. & Rose |
| Ferula macrocarpa Hook. & Arn. | Lomatium macrocarpum (Hook. & Arn.) L.M.Coult. & Rose |
| Ferula newberryi (S.Watson) S.Watson | Cymopterus newberryi (S.Watson) M.E.Jones |
| Ferula nuttallii (A.Gray) DC. | Lomatium nuttallii (A.Gray) J.F.Macbr. |
| Ferula palmella Hook. | Cymopterus glomeratus (Nutt.) DC. |