CCDB is a community resource. If you are aware of any missing data or if any of the counts are erroneous please submit it to the forms submit new counts, or report erroneous counts.
CCDB → Angiosperms → Compositae → Silphium → Silphium speciosum Nutt.
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| Silphium speciosum Nutt. | Silphium integrifolium var. laeve Torr. & A. Gray | 14 | IPCN67-71 | SETTLE, w. J. 1967. The chromosome morphology in the genus Silphium (Compositae). Ohio Jour. Sci. 67: 10-19. | |||
| Silphium speciosum Nutt. | Silphium integrifolium var. laeve Torr. & A. Gray | 14 | Fedorov, 1974 | Fisher T. R., Cruden 1962 | |||
| Silphium speciosum Nutt. | Silphium integrifolium var. laeve Torr. & A. Gray | 7 | Cave1962 | Fisher & Cruden 1962 |