| Classification | Asteraceae: Silphium |
| Harvard University Herbaria Barcode(s) | 00012375 |
| Type Status | Syntype, Isolectotype |
| Collector | F. J. Lindheimer |
| Country | United States of America |
| State | Texas |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Texas: Harris County: Houston |
| Date Collected | 1842-04-** |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/ed91fb8c-0394-4bbf-8ce8-1716c3f2ee6a |
| Harvard University Herbaria Barcode | 00012375 |
| Herbarium | GH |
| Family | Asteraceae |
| Type Status | Syntype |
| Syntype of | Silphium gracile A. Gray |
| Verified by | Bates, Vernon M. |
| Date Determined | 1983 |
| Annotation Text | SYNTYPE |
| Taxon Reference | (for Silphium gracile A. Gray) Proc. Amer. Acad. Arts 1873. 8: 653. |
| Family | Asteraceae |
| Type Status | Isolectotype |
| Isolectotype of | Silphium gracile A. Gray |
| Verified by | J. A. Clevinger |
| Date Determined | 1999-07-** |
| Determination Remarks | [filed under] |
| Taxon Reference | (for Silphium gracile A. Gray) Proc. Amer. Acad. Arts 1873. 8: 653. |
| Family | Asteraceae |
| Determination | Silphium radula var. gracile (A. Gray) Clevinger |
| Determination Remarks | [current name] |
| Family | Asteraceae |
| Determination | Silphium gracile A. Gray |
| Determined by | [L. M. Perry (scripsit) J. McI. Shapiro, 2020] |
| Date Determined | 1936 |
| Annotation Text | ! ; [Annotated on sheet] |
| Family | Asteraceae |
| Determination | Silphium scaberrimum Elliot |
| Determination Remarks | [label name] |
| Family | Asteraceae |
| Determination | Silphium gracile A. Gray |
| Determined by | [A. Gray (scripsit) J. McI. Shapiro, 2020 |
| Sex | not determined |
| Phenology | NotDetermined |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
