| Classification | Asteraceae: Riddellia |
| Classification 1 | Asteraceae: Psilostrophe |
| Harvard University Herbaria Barcode(s) | 00135196 |
| Type Status | Possible Syntype |
| Collector | Josiah Gregg |
| Collector number | 318 |
| Country | Mexico |
| State | Coahuila |
| Geography | North America: North America (CA, US, MX) (Region): Mexico: Coahuila |
| Locality | Saltillo |
| Date Collected | 1848 - 1849 |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/d825839a-6719-42ff-8ed7-f23b4d5a26de |
| Harvard University Herbaria Barcode | 00135196 |
| Herbarium | GH |
| Previous ownership | ex John A. Lowell; Transferred from the Boston Society of Natural History to the Gray Herbarium of Harvard University, October 2, 1941 |
| Family | Asteraceae |
| Type Status | Possible Syntype |
| Possible Syntype of | Riddellia arachnoidea A. Gray |
| Taxon Reference | (for Riddellia arachnoidea A. Gray) Mem. Amer. Acad. Arts 1849. n.s. 4: 94. |
| Family | Asteraceae |
| Determination | Psilostrophe gnaphalodes de Candolle |
| Determined by | C. B. Heiser |
| Date Determined | 1944 |
| Determination Remarks | [current name] |
| Family | Asteraceae |
| Determination | Riddellia arachnoidea A. Gray |
| Family | Asteraceae |
| Determination | Riddellia tagetina Nuttall |
| Sex | not determined |
| Phenology | Flower |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
