| Classification | Asteraceae: Cirsium |
| Classification 1 | Asteraceae: Carduus |
| Harvard University Herbaria Barcode(s) | 00004612 |
| Type Status | Syntype |
| Collector | F. Tweedy |
| Collector number | 759 |
| Country | United States of America |
| State | Wyoming |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Wyoming |
| Locality | Soda Butte Creek, Yellowstone |
| Date Collected | 1885-07-** |
| Elevation | 2195 m |
| Verbatim Elevation | 7200 ft. |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/2506f646-0430-4c86-afe2-c96100c7b846 |
| Harvard University Herbaria Barcode | 00004612 |
| Herbarium | GH |
| Family | Asteraceae |
| Determination | Cirsium hookerianum Nuttall |
| Determination Remarks | [is label name] |
| Family | Asteraceae |
| Determination | Cirsium tweedyi (Rydberg) Petrak |
| Determined by | Moore, David |
| Date Determined | 1962 |
| Annotation Text | or close |
| Family | Asteraceae |
| Type Status | Syntype |
| Syntype of | Carduus tweedyi Rydberg |
| Verified by | P. Barlow (UNM) |
| Date Determined | 1989 |
| Determination Remarks | [is filed under name] |
| Annotation Text | Syntype |
| Taxon Reference | (for Carduus tweedyi Rydberg) Mem. New York Bot. Gard. 1900. 1: 449. |
| Sex | not determined |
| Phenology | NotDetermined |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
