| Delphinastrum andersonii (A.Gray) Nieuwl. | Delphinium andersonii A.Gray |
| Delphinastrum grandiflorum (L.) Spach | Delphinium grandiflorum L. |
| Delphinastrum menziesii (DC.) Nieuwl. | Delphinium menziesii DC. |
| Delphinastrum nelsonii (Greene) Nieuwl. | Delphinium nuttallianum Pritz. |
| Delphinastrum nudicaule (Torr. & A.Gray) Nieuwl. | Delphinium nudicaule Torr. & A.Gray |
| Delphinastrum nuttallianum (Pritz ex Walp.) Nieuwl. | Delphinium nuttallianum Pritz. |
| Delphinastrum tricorne (Michx.) Nieuwl. | Delphinium tricorne Michx. |