| Classification | Asteraceae: Cnicus | 
| Classification 1 | Asteraceae: Cirsium | 
| Harvard University Herbaria Barcode(s) | 00006033 | 
| Type Status | Type | 
| Collector | J. T. Rothrock | 
| Collector number | 284 | 
| Country | United States of America | 
| State | Arizona | 
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Arizona | 
| Date Collected | 1874 | 
| Container | Explorations and Surveys West of the 100th Meridian | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/303d4ccb-2a93-4769-872a-5e626b07320a | 
| Harvard University Herbaria Barcode | 00006033 | 
| Herbarium | GH | 
| Family | Asteraceae | 
| Type Status | Type | 
| Type of | Cnicus rothrockii A. Gray | 
| Verified by | Shinners, Lloyd Herbert | 
| Date Determined | 1946-02-16 | 
| Determination Remarks | [filed under] [current name] | 
| Annotation Text | ! | 
| Taxon Reference | (for  Cnicus rothrockii A. Gray) Proc. Amer. Acad. Arts 1882. 17: 220. | 
| Family | Asteraceae | 
| Determination | Cirsium rothrockii (A. Gray) Petrak | 
| Determined by | B. L. R. [Benjamin Lincoln Robinson] | 
| Date Determined | 1911 | 
| Annotation Text | Nomencl. Rev. Acc. To Internat. Rules | 
| Family | Asteraceae | 
| Determination | Cnicus arizonicus A. Gray | 
| Determination Remarks | [label name] | 
| Family | Asteraceae | 
| Determination | Cirsium rothrockii (A. Gray) Petrak | 
| Annotation Text | Synoptical Flora of North America | 
| Sex | not determined | 
| Phenology | NotDetermined | 
| Preparation Type | Sheet | 
| Preparation Method | Pressed |