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| Family | Asteraceae |
| Basionym | Silphium perplexum J. Allison |
| Original Identification | Silphium perplexum J. Allison |
| Current Taxon | Silphium perplexum J. Allison |
| Protologue Citation | Castanea 66(1-2): 188-189, f. 12D-F. 2001. |
| Holotype/Isotype | Isotype |
| DUKE Accession Number | 399590 |
| Comments | |
| Primary Collector | James R. Allison |
| Collector Number | 12153 |
| Collection Date | 18 Aug 1999 |
| Country | United States |
| Province/State | Alabama |
| Plant Location Notes | Dalla County. Ca. 15.5 km SW of Selma, ca. 17.5 km SE of Marion Junction, and ca. 2.4 km WSW of Old Cahaba; S side Co. Rd. 2 at jct. Co. Rd. 9; prairielike openings over chalk. |
| Plant Description Notes | n/a |
| DUKE Barcode | |
| Broad geographical location | North America |
