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CCDB → Angiosperms → Compositae → Silphium → Silphium laevigatum Pursh
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| Silphium laevigatum Pursh | Silphium asteriscus L. | 7 | IPCN67-71 | JONES, S.B. Jr. 1968. Chromosome numbers in southeastern United States Compositae I. Bull. Torrey Bot. Club 95: 393-395. | |||
| Silphium laevigatum Pursh | Silphium asteriscus L. | 14 | IPCN67-71 | SETTLE, w. J. 1967. The chromosome morphology in the genus Silphium (Compositae). Ohio Jour. Sci. 67: 10-19. |