| Name | Silphium atropurpureum Retzius |
| Authorship | Retzius |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Silphium |
| Contains | Silphium atropurpureum f. hirticaule Fernald |
Copyright © 2013 The President and Fellows of Harvard College | Accessibility
| Name | Silphium atropurpureum Retzius |
| Authorship | Retzius |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Silphium |
| Contains | Silphium atropurpureum f. hirticaule Fernald |